Help!!

Michelle

So I’m currently 19 days late for AF. I took a pregnancy test November 28th but it was negative. I had a chemical pregnancy in August 18th and I got my period on October 12th. I haven’t had a period since then. I’ve taken several tests but they all have been negative. I just don’t know what’s going on. I mean I have irregular cycles but I haven’t been this late with an irregular cycle.