Okay, so I had sex 2 days before ovulation. I am on birth control but I was currently taking a antibiotic for a UTI. He came inside me and I went and took a plan b about 36 hours afterwards. My vagina feels heavy/full and my lower stomach is really hard and I’m cramping. I am also very nauseous at night time. I am supposed to get my period on Thursday. I’ve never had these problems before my period. Could I be pregnant and is it okay to test a few days before your period? Please help