So my doctor called me around 5 today and said that I tested positive for chlamydia. And I'm now considered and high risk pregnancy, she proscribed my 1000mg antibiotics as a one time treatment. I haven't been with anyone else in over 3 years, and my SO says he hasn't either. I do working in a nursing home as an LPN, is there any other way I could've gotten it? Or do you think my SO cheated on me?