Question about pregnancy

So I haven’t had sex since august about 8 weeks ago and I just got off the pill and had a heavy withdrawal bleeding after going off of it in September (got my period twice too) . I haven’t had a period yet this month and it’s October 12 my last bleeding started the 22nd of last month and lasted 6 days.

Am I ok or my period just got messed up

I think I’m feeling PMS symptoms but idk I have slight nausea my back hurts and slight cramps