Periodd help????

Ohkay. So I think I got my first period in March. It was light brown and I got a huge spot on my undies the first day. So I made my own type of pad with tissue paper. The next week days, I wore a pad and there was like little tiny dots and spots sometimes. Then about three weeks later. I got it again but not like that. It was brown again, but kind of darker with little specks of deep red. It was spotty like the first one but a little more and lasted around 8-9ish days. The very last day, I got it at night and it was the heaviest all week. Now it's two weeks later. Should I get it again in a week? Because our pool opens then and I don't want it then b.c I want to go swimming but I'm scared with the tampon thing. Plus will it every turn red? And will it get heavy? It seems like I get REALLY heavy discharge, but then I put on like a panty-liner or pad and I don't get it again all day. ITS SO WEIRD! Same with my period. Is that normal? Or was that not even my period? SO CONFUSED btw im 12