Throat/Tonsil Problem-Urgent!

Hello,  I am a 41 year old female.  I found a white patch about the size of a pencil eraser(as much as I can see of it) on my right tonsil.  I have not been sick but have taken a 10 day course of Amoxicillin 500mg to see if I had an infection.  The antibiotics did nothing. I noticed this about a month ago.  I also have a lump in my right groin area that has grown from a pea size to about the size of a quarter (doctor said it was scar tissue from a previous Cat Scratch Fever lymph node removed in my groin about 2 years ago) If it is scar tissue I don't understand why all of a sudden it has appeared?  I don't have healthcare so it is virtually impossible to find a physician to see me.  I did go to the Health Department but was totally unsatisfied with the results as the nurse practicioner didn't do more than briefly look in my mouth and told me if I had insurance she would refer me to a specialist.  I'm kind of freaking out here.  I don't know if it's cancer, herpes or just something that will go away but I didn't have it before so it's not normal.  There is not much pain except my right jaw and ear have had a dull pain constantly for months now but I attributed that to a rotten tooth I am having fixed next week.  I haven't been sick just tired and a little moody.  Can someone please please help me!  I am a mother of 6 and if this is something serious I need to get it taken care of somehow.  Feel free to ask any questions to help figure this out.  Wish I had a picture but it's kind of hard to take a picture of the back of your throat.  Thank you so much in advance for any help.