What is the cause of the blood in stool for a 28-year-old male?

Hi doctor,

I am a 28-years-old male and I have blood in my stool. I know there is blood in my stool because the paper is red after I wipe. It is only a little bit, sometimes, the paper is deep red, and all I have to do is blot "the area," and it will still be deep red. This has been going on for quite some time (a couple of months). There are no painful bumps, and I have no digestive issues. I do not exercise regularly, but I eat pretty well, and I am not overweight. I never have blood spots on my boxers. So when I give up on the paper being blood free and leave the bathroom, there is no continued blood flow. I have myoclonic epilepsy. I was diagnosed at 13 or 14 and have been on Lamotrigine. My current prescription (increased as I have gotten older) is 300 mg tablets nightly. Recently that prescription has not been enough, and since any more Lamotrigine would exceed my levels, I was prescribed Levetiracetam, a 500 mg tablet, nightly. This issue has been going on since before the second agent was added. As long as I live as I should, my epilepsy is well managed. My father has had melanoma a couple of times and prostate cancer in his middle age. Other than my epilepsy and my father's cancer, there is no different medical history. I do not get sick. I ''go to the bathroom," on average, twice daily. Once in the morning after coffee, and (on average) once later on sometime in the afternoon. It is usually solid but runny after certain types of food, so pretty much average. Please help.