Irregular period.. last month was 47 days.. I’m at 32 daysand got bleeding

Jess

I’ve gotten nauseous, dry heaving this morning, backache really bad, and boob tenderness which normally accompanied my period.. I ovulated exactly two weeks ago in a couple of days and I used opk kits to track ovulation. Normally my periods are very long, this month is very short. Implantation bleeding? Or period?