Light period

Ok so I got my period 3 days ago, n I had bad cramping. It usually gets heavier, but it's still light. Like the 1st day. I'm so confused. Tmi, but I had a tampon in n I took it out n none came out for an hr or so n then there was some drops so I put another one in n took that one out like 20 min ago or so n there was barely an on it!! I'm so confused. N it's the 3rd day. My periods would be heavier by now. Especially on the 3rd day. My periods r usually 7 days. Help????