So there have been many sights that I have read about what the symptoms are. After finding out that I was pregnant with my ex-boyfriend's son, they tested me for STDS. The test showed up positive for clamidia. But the reason of the breakup between me and the baby's father was because I thought he had been cheating. So when the test came back positive, I thought for sure he had to have given it to me from someone else. But my question is, is it possible that he had it from a previous relationship before me and then unknowingly gave it to me? We were intimate for 5 months before I became pregnant.

This site should answer all your questions.

Chlamydia << Frequently Asked Questions << womenshealth.gov

It is possible that he had it from a previous relationship and did not cheat on you.

He may have not know that he had it as chlamydia may never show any symptoms.