Body Out Of Whack?

My new partner and I have had unprotected sex 4 times now. Both times were about a week, week and a half before I ovulated. I didn’t get typical discharge like when I ovulate. Ever since then my breasts have been sore. More so than usual and normally they don’t get sore two weeks before my period. I’ve gotten random cramping since then and my period should be due to start today but hasn’t. On that note, it’s not always unusual for it to be a couple days late. I’m wondering if perhaps I should get a test to be safe or wait. I don’t want lectured about having unprotected sex. We’re both clean and we’re both grown adults and I get put on birth control tomorrow.