Hello, Thanks for using healthcaremagic. Diarrhea and abdominal pain since 2 months is quite embarrassing. I think this had been affecting your routine life also. First of all you should go for sodium and potassium level testing as this much diarrhea can cause electrolyte imbalance and make you weak and sometime severe medical problem arise.Start taking Oral Rehydration solution(ORS) also. For your complaint I can give you few probable diagnosis, you must consult doctor to reach to conclusion. As there is unprotected anal sex, chances of some infection through this.For that you need to check your total blood count as well as if needed urine and stool examination.You should be checked by doctor for local examination also. Another thing might be some inflammation of digestive system, for that ultrasound of the abdomen is needed. And symptoms you just described are of like irritable bowel syndrome, so evaluation for that also needed as it is autoimmune disease. If you have also fever and severe weakness, please go to doctor without delay. Hope I have answered your query, late me know if still any info needed. Regards, Dr. C. K. Solanki