long post: please answer!

so I know everyone hates the 'am I pregnant' posts - I do too. BUT it is too early for me to take a pregnancy test. I currently have a UTI, my worst one yet, and my breasts hurt so much I can't even walk without them hurting or even touch them without pain (I get sore breasts before my period usually but this is beyond anything I've experienced). so here is my real question: I am on birth control but was on antibiotics earlier this month. I have heard that those can cancel each other out and it is possible to get pregnant. I am mostly wondering if anyone has experienced any of these things early on in pregnancy or if I'm just being crazy. please answer.