... boyfriend and I had unprotected sex and I'm pretty sure he at least partially, came inside me. It's only been about 4-5 days since and I'm about 9-10 days out from my period. I currently have a vaginal yeast infection, fatigue, bloating, back pain, neausa around certain foods, and constipation. I was wondering if this could be caused by the birth control or if these were all signs of possible pregnancy?