Hi I had unprotected sex using the withdrawal method multiple times 16 days ago which was about 5 days after my period. and I've been feeling nausea and lower abdominal pains for two weeks now. My cervical mucus has been pretty dry since and the little I've seen is thick,white,it has no stretch ,but sticky. I've been peeing more and a lot of times I feel like I really have to go but little comes out. My worse symptom is my breast,they've hurt for two weeks straight, mainly the nipples. They seem a tad bigger and the nipples are always hard. Could I be pregnant or is it an infection?