Please help!

Angel • Wife:5 year old son👦🏼 and a rainbow baby on the way!👶🏼 🌈

So I've had really bad nausea for about a week now with sore nipples. I NEVER have these symptoms before AF comes. My period is supposed to start for about another 3 days. I took a pregnancy test this AM and got a BFN. My question is if I'm not pregnant could these be just new PMS symptoms?