Please help!

Angel โ€ข Wife:5 year old son๐Ÿ‘ฆ๐Ÿผ and a rainbow baby on the way!๐Ÿ‘ถ๐Ÿผ ๐ŸŒˆ

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?