I was due 26/03

Light spotting began on 20/03 for 2 days, then I had 2 days of heavy flow with clots. I had no cramping? I usually feel all the typical period symptoms. And another day of light flow.

I then was period free for a day and back on the 27/03. Once again no cramping. It's light one minute, heavy the next, I think the period has ended, then it's back. It's the 02/04 and I'm still bleeding.

What is going on!? I'm not on any contraceptive, I'm usually 28-32 day cycles. Never been longer than a week. I'm 20.