15 days late

Hell my name Indoya I’m in a Stuff situation wud my period. It’s irregular so it don’t always come one time will. I had my period in October then November came I was having symptoms like my period but wasn’t. I was late for 20 days then in the begging of December I had my period but it wasn’t like my normal period it was only 4 days and on and off spotting and bleeding. But everyone said it’s probably that was cause I was stressed a lot. But I haven’t been stressed out lately. I and my cycle haven’t came but getting negative pregancy test.. I’m having cramps and PMS symptoms but no period. Anyone else deal wit this and then got a BFP a month later. I also ovulated late my last cycle..