It's been about 6 weeks since the incident and I started to have constant nausea throughout my day starting about a week ago. I am aware of the 3 month window, but I tested at 2 weeks and 5 weeks and both were negative. I'm worried now. I find it really difficult doing anything. The nausea stops me right in my tracks. At the moment I am not having any other issues. I also was negative on both STD tests for gonorrhea, chlamydia, and syphilis. I'm really worried.