Cramping since 1 DPO??

Nee

I’ve had a dull cramp since 1 dpo, it is 3 dpo now, and even pain in my lower back as well, I get my period every 31-33 days so it can’t be period cramps. I rarely get cramps to begin with until 2 days beforehand. Could this be a possible pregnancy sign? Also my cm is creamy and watery ( sorry if TMI lol )