Confused

My period is now 8 days late when I'm always like clockwork. I Had unprotected sex @ ovulation day. Took 2 tests - 1 dollar store test and 1 clear blue both were negative. Getting a lot of cramping, heartburn and sore breasts. I driving myself nuts bc I feel like I have signs of being pregnant but 2 bfn. And if I'm not pregnant then I'm worried it's something else and I don't have health insurance. Guess I will just wait to see if AF comes.