May be pregnant?

So I stopped taking the pill about a month or so ago, since then my SO and I have had unprotected sex.

I had a period beginning of Feb/late Jan but I haven’t had one again. I’ve been on and off cramping and my boobs hurt so bad to the point I can’t even wear a bra.

Took a test a week or so ago and it came back negative.

Planning on taking another in a few weeks but until then any thoughts on what it could be?

My boobs never hurt this bad in my life even when I was pregnant with my son.

HELP!!

Edit: I’ve also have been having a lot of weird cravings (ie wheat thins and sardines) and some nausea