What Other Tests Should I Ask For?

Here's my prob. 10/16/04 I had a surgical abortion. The doc had a very ugly sore on his forehead and it was oozing pus and such. I say this because maybe this is where my thing came from, don't know. About 2 months later I went to primary doc and was given flagyl for urinary track infect. And constipation. Well all symptoms disappeared. 2 or 3 weeks later, cronic constipation came back. Flagyl again, all symptoms went away. 2 weeks later they came back. I also started to notice a small soft lump on my lower left abdomen that is huge now, soft tissue. I also have this itchy sensation there too and feels like there is pressure there now that it is bigger. This happened 2 more times. Then I was put on a combo of cipro and flagyl. Nothing. I have had some tests done, u sound 2 times, x rays, colonoscopy, blood work a women's health panel to be specific, witch I guess doesn't specifically look for any infections or stuff just check to see if I have high blood pressure or thyroid probs, you know. So what should I do now? There is also sensitive skin on that lump and sometimes it feels hot to the touch. I have changed my diet and tried all laxitives, even rx, and now am taking a colon cleanse, but what happens to me when that stops working, I am scared. Please help. Thank you. :(