hey.so I need a lot of help here I’m so confused 

so I’ve been off the pill for about a month now my partners and I are ttc we did the deed on the 13th and 14th of September my period was due on the 5th of October I am now 4 days late I’ve been cramping on and off for about 2 weeks now and super bad today and last night I’ve been having a lot of nightmares and these 2 weeks also but today I got what I think is a period it’s like very watery and red never when I pee just when I whip normally my period is dark and like a medium flowing and I can feeling it coming!!! Could this just be because I’m not on the pill anymore or something else could I be pregnant?