Hi there, I need a bit of advice because I've been having a few problems for about a month now and don't seem to be getting much joy out of the doctors.

I am a 28 year old male and about a month and a half ago I found myself with some pain during ejaculation and rectal burning which upon research seemed to be suggest an issue with the prostate. I went to the doctor's, got checked out and they said there seemed to be no problem with the prostate, to my relief. A week or so later I was still having problems with rectal burning now accompanied with what seemed to be some minor pains in my stomach. Upon a bit more research I've come to find that some of these symptoms seem to be relatable to colon cancer and possibly bowel cancer. I have been checking my toilet habits and have found I am passing about 3/4 times a day (which seems to be normal for me as I believe I suffer from IBS which hasn't be confirmed by a doctor), the stool doesn't seem to be quite a hard as it used to be and a little more misshapen now, there is no blood in my stool or urine as I have been checking and I don't seem to be losing any weight or dealing with fatigue or anything so I'm really not sure what to think. I'm trying to get in to my doctor's again to get rechecked but does this sound like anything to worry about?

Currently my rectum is still burning, I cannot tell whether the burning is at the entrance or coming from within, and I still have the stomach issues.

Please help. Thank you.