? risk/signs of colon cancer, petrified of colonoscopy. Please anyone! I feel like I'm at the end of my rope.

I was curious about the symptoms of colon cancer?  I used to have IBS quite bad in my teens.  When I was 26 I had a colonoscopy (due to more blood in my stool than stool for 3 years) and they found 4-7 small pea sized polyps. That was 16 years ago. Back then I weighed ~82 pounds at 5 foot 5 inches tall.  They told me to come back in 6 months and then every year thereafter.  I never went back.  I am now 42 and weigh ~170 pounds.  
The pain that I went threw was unreal during the colonoscopy (a total nightmare), I actually lifted myself off the table and hit the doctor in the mouth (with a tube up my butt) because he would not stop.  Next thing I knew he screamed for someone to get me down before I ruptured myself. After that I just remember waking up in a room with a bloody adult diaper on.  Sigh...Stupid on my part I guess with the tube and all.

Problem now.  My primary doctor wants me to come back for another colonoscopy.  My CEA results were 1.8.  I've had a ton of test and found out I have hypertension, hyperlipidemia, hypothyroidism, and type II diabetes.  .......hyperlipidemia, hyperglycemia, and hypothyroidism are all under control.  

I have a lot of issues with bloating, gas and burping, all over  (bad) body pains/spasms, palpitations, chest pains, lightheadedness, vision issues (everything goes black sometimes, blurry or wavy after a rapid jump in my BP and heavy sweating).  I freeze when the temp is 72 or lower and (while sitting) if the temp is 80 or over feel like I'm going to pass out.  When I cough it hurts my ovary area.  I went to an OBGYN and she said that everything was ok hormonally and down there; but, that I did have a lot of bloating pushing down in that area probably pinching the ovaries.  Her advise to me was to quit drinking any coffee, liquor and smoking.  I'm at a lose and feel like I'm at the end of my ropes sometimes.  Coffee (4-6 cups/day), cigarettes (1-2 packs) and a couple drinks (2-3 mixed)...I know is wrong; but, at 42 I don't think could be causing all of this.  Fired OBGYN due to her advise.  Maybe I'm wrong..... I DON"T KNOW.  I just hate feeling like doo doo.

I have a Grandmother (on my moms side) that had colon cancer (it spread all threw her organs and an uncle on my father's side, also that is now gone to heaven.  
My IBS seems under control (and has been for ~10 year), I have no blood in my stools and they are light in color. Most of the time it's airy type stools, sometimes flat but other times big and round, lately off and on a little constipation with pellets.  LOL  Sorry if that too much information!  This is soo embarrassing to talk about.  From what I understand....blood is a first sign.  I do not have this.  I don't know if any of this even makes since to you.  

My big question is could there be a risk for colon cancer AT ALL with what is listed above.   I'm truly petrified of another colonoscopy!  There's only one group around here that does them and they won't change the med's they use for it ......in which don't do anything for me at all.  They told me to just do it and deal with it.  Sigh.  I don't know what to do?????
Sorry this is so long; but, actually I tried to summarize it the best I could.

Thank you in advance for any reply's.

[GeezLouize75]

I, too, have a family history of colon cancer so I started getting colonoscopys at age 40.  I am now 52.  I have never had a colonoscopy without anesthesia and being TOTALLY out during the procedure.  Sounds like you were awake? I have never felt the slightest pinch during the procedure. Are you in the U.S. or another country?

[Maxmama77]

I would totally recommend begging for anestesia, and if they do not offer this, than choose a different doctor. Why in the world would one have to be awake for this procedure? With mine, I was in a fog, and think I fell asleep like normal surgery.

[CherryLouise]

I have had colon cancer and two previous colonoscopies, and am scheduled for another next week.   I can't understand any doctor who wouldn't give proper sedation/anesthesia for this - surely it's much easier to do properly if the patient is out of it and not wriggling and complaining.  
The "conscious sedation" I'm given is midazolam and fentanyl.  The doctor tells me that the patient is able to respond to simple commands, such as "turn over", but I don't know about this as I don't remember a thing afterwards.  Last time I had a fleeting sensation of pain as I came to, and the nurse confirmed that the procedure had indeed been painful for me at times, but I had absolutely no memory of it at all.  
Of course I am not delighted to have to have this procedure, but it did detect my cancer, which was quite large by the time it was discovered.  The only signs I had were bleeding and a narrow stool.  I know I'm cured now, but I shall dutifully have colonoscopies according to the approved schedule so that if anything else pops up it can be taken care of in timely fashion..