Helppppp

Hey ladies so last month I had a bit of a weird cycle, I bled for two days and then started it got lighter on the 27th and then light spotting(brown) Starting from the 28th-29th, which is odd because I normally have a 5 days period regardless. I’ve been feeling tired, non stop greasy hair no matter how many showers I take a day, headaches and the odd nauseous day. Lots of cramping and pelvic pain aswell not to mention 0 energy all the time. So would you say my last proper period was December time? Or would you class January as period?