just my anxiety, or a real problem?

My name is Kayla. I don't quite know how long I've been suffering from anxiety, but it's been a long time. I worry far too much about everything, I constantly assume the worst, my self esteem needs lot of improvement, and I have some very hypochondriac-ish tendencies. Let me explain;
-Almost a year ago, I was convinced I had gum disease. For almost four months, the worry destroyed me, all I could think of was that my teeth were going to fall out and it was going to get so much more painful and how much money it would cost to get the problem fixed. When I finally got money to see a dentist, he told my teeth and gums were in great shape. No cavities, no enamel wear even. Nothing.
-A few months ago, I thought I was pregnant. I had no good reason for thinking this this since the boyfriend and I practice safe sex. However the thought latched on and gnawed away at me, driving me to Google. I discovered that some symptoms I'd been having were pregnancy symptoms (I had a strange taste in the back of my mouth that I could not get rid of, to name one) as well as constant nausea and a complete loss of appetite. I tried to be reasonable and tell myself that nausea could be due to anything, probably the anxiety, but I could not stop worrying. Six home pregnancy tests and a doctors visit later, I was assured that I was not pregnant.
-Shortly after that, I became sure I had an STD, herpes. I noticed small lesions on my lady bits but no other symptoms. Again, I googled. My worry grew and grew, remembering that my previous boyfriend had been somewhat of a man ***** before we got together. I told the current boyfriend and he was kind enough to get tested with me and not be mad, even though he'd been tested not too long before that. Most likely, he knew I was overreacting. The time it took waiting for test results to come back were hell. I cried a good deal when I got the phone call telling me that I had tested negative. The lesions were from a simple little yeast infection.

Here is my current problem; my heart. My heart rate nowadays is typically at about 80 bpm. I know that's not so bad, but it worries me that it's that high. I also get concerned over my breathing. Oftetimes, it feels like I'm not inhaling enough, like I'm not capable of taking in enough air to fill my lungs. This isn't constant, many times I'm able to take a full, deep breath. When I'm not thinking about breathing, my breathing is fine. But when I try to concentrate on my breathing (as many "calming" breathing excersizes want you to do) I find that it's harder. I also get winded very easily. I realize I'm not in the best shape I could be in (I do like my junk foods) but I get a fairly good amount of excersize and I'm at the perfect weight for my height.
On top of that, I have chest pains. They also are not constant. Usually the pain is in the center, in my sternum area. Sometimes it radiates outward into my ribs, sometimes my lower ribs even. It's a sore kind of pain, like when you have a simple sore back muscle. It feels almost like it could be massaged away (I'm a massage therapist and have tried to do this but unfortunately, I'm a lady and my boobies prevent me from being able to do this.)
I'm trying to tell myself that my anxiety is creating false symptoms again. The slightly elevated heart rate alarmed me and from there, other symptoms arose. However, if this is a heart problem, it's serious. I don't know what exactly I should do.

Another thing causing me worry; I was constipated for four days. I took magnesium citrate on Tuesday and it seemed to work, but I haven't had a good BM since then and I'm getting concerned.

[loz23]

ok. I would say this is definatley anxiety. You seem healthy and fine.

Just try to relax a little because all your worry and stress isnt healthy in itself! Eat healthy, exercise... keep happy :) meditate! relax... and enjoy your blessed healthy life.

If you were seriously sick I am sure you would be able to tell. But you are fine sweety. x

[MMahon]

Yes it does sound like typical anxiety.  Your symptoms are very common with anxiety disorder.   Have you sought help for anxiety in the past?  You should get a good physical exam and blood work to rule out other possible causes for your symptoms but I think you'll find that they derive from anxiety/depression.   Ask your doctor for a referral to a psychiatrist to discuss treatment.  Anxiety disorder is a serious illness and as you are learning can severely impact your life in many ways.  Don't dismiss it.  It needs treatment.  Don't let it control your life the way it has been.  Let us know how you  make out.