Period 2 weeks late

My period is two weeks late and I’ve taken 4 pregnancy tests and they’re all negative. I took a plan be the cycle before and I got my period like normal but this cycle is late. I’ve been having unprotected sex. Can I be pregnant? Should I go get checked up? This cycle I’ve been stressing a lot, my sleeping schedule is messed up, and I started taking new vitamins which makes my cycles a litttle funky. Any advice????