Help pleaseeee

Aleeya • Engaged💍 and first time mommy to a little girl 👶🏻

AF supposed to come on Wednesday! Today while at work I started getting horrible cramps. Went to the bathroom and I had like bloody CM. It’s gotten heavier through the night. Took a test tonight and it said negative, but idk if this is my period or not??? It’s not super heavy and not light or spotty!