On 5th november, my boyfriend masturbated, wiped his hands thoroughly with tissue after an orgasm and fingered me about 20 minutes later. He said his hands were completely dry. My last period was on 18th october. Is there any chance I could be pregnant? I have irregular periods, and have been pretty stressed out for the past 2 weeks because of final exams and excessive traveling. I have some cramps and feel a bit nauseous. Also, I have not been exercising for the past month while I used to do so every day. I used to have polycystic ovaries. Thank you.