Hey, I've never posted on here because I've never had any sort of real health concern before, so bear with me, please.

I'm 25 years old, still a virgin (due to beliefs), and have recently developed a whole line of problems, when I was always healthy as a horse before.

*Starting in November, I suddenly began constant sneezing and losing my voice, which caused me to be allergy tested. I learned I am now allergic to dust mites and have to take a daily dose of Allegra. Due to what was believed to be work related stress, my doctor also started me on Zoloft.
*In December, I had my tonsils and adenoids removed.
*On March 20th, I was working with my students after school, when I suddenly felt a strong twinge/pain in my lower right back. This continued to come and go, seemingly randomly, for several weeks, still continuing until now.
*My first period after the pains began March 23 and was slightly lighter and shorter than normal, but with stronger cramps. (I've always been extremely regular, with each period being light for two days, heavy for one, average for two, and spotting for a day or two, with only light cramps.)
*On the evening of April 1st, I began to have extremely strong menstrual-type cramps on the right side which even went as far as to make me feel nauseated, although my period was now over. During the night, I began having to frequently urinate, and it was painful. The next morning, I went to my doctor, and he prescribed antibiotics, saying I had a UTI, although I had never had one before. I took the antibiotics for the full week they were prescribed but still felt pain when urinating for the first three days, which I have been told is longer than I should have.
*On April 8, I returned to my doctor, telling him I still felt the lower back pain and how long the urinating pain had lasted. He gave me a prescription for more antibiotics and told me to go see a urologist.
*On April 11, I saw a urologist. He took an X-ray and told me I probably had a kidneystone that just didn't show up on the X-ray. He also told me that he doubted I ever even had a UTI... By this point, the pain in my lower right back was increasing to at least once an hour (lasting about 20 seconds or so each).
*On April 16, I began to feel the same pains, except in the left side of my lower back.
*On April 17, I returned to my urologist. He told me the left side pains were probably in my head. Then he did a CT scan of my abdomen. He did not find any sign of a kidney stone. He did, however, tell me that my uterus is much larger than average and that I had what appeared to be a cyst on my right ovary. That same night, my period started again. Early, MUCH lighter than normal, and with extremely bad cramps.
*I immediately made an appointment with an OB/GYN, but since I am rather new to this area, I hadn't found a doctor in that field here yet. So, in other words, I have to wait until mid-May until I'll finally get in to see a gyno. However, the pains on my right side in the back have increased so they're now every few minutes, usually lasting a couple minutes each. I've been having cramping pains in my right front side quite a bit, causing nausea on several occasions (never vomiting--I have a high tolerance, thankfully).
*As I was trying on new clothes the other day, I saw myself in a full-length mirror and discovered that my stomach seems to be poking outward slightly--I've always been rather thin and haven't changed my eating habits, so this seems quite odd to me.
*Starting yesterday (May 1), I began to feel a pain that feels like I sat down on a spike, although I was just standing there, teaching my class. (It's a really good thing my students are used to me making weird faces, since I'm a goofball. Otherwise, they would've thought something was wrong. Teenagers are too inquisitive.) The pain only lasted for about three or four seconds--which was really good or else I probably would've started crying. I felt it again today, as I way lying down for a nap.

Anyway, all of this is really starting to bug me. Does anyone know what is going on? Might it have anything to do with the Allegra or Zoloft? Or is it something more serious? My friends are all claiming miraculous conception... If anyone could help a bit more than that, I would greatly appreciate it. Thanks.