When should I test.

I had AF Christmas weekend for about 3 days. Had unprotected sex the 27th. Starting on 1/1 my nipples have been so sore and always hard, also I’ve been having mild cramps with stabbing pain on the side of my stomach plus lower back pain. When should I take a test. Wait two weeks from the day we had sex or when I miss my period, it’s suppose to start 1/10 but that’s hit or miss I am irregular.