Why Am I Getting Period Twice In A Month?

Hi, I have a problem. so on Aug, 5 I started my period and got off on the 12th which is normal Bc my period lasts for about a week. Then like 10 days after I Started bleeding again? Today's Sept, 2 and I'm still on my period. It started off ass spotting then a few days after it got to a normal period and now it's light again. So i've been bleeding for 10 days now. Dkk what it is. I called my gyno but he said to just make an appointment mid September. But I don't wanna wait that long to know whats wrong. Iby the way, I am sexually active and my boyfriend and I don't use no protection. As in no condom or birth control. Just the pull out method. I don't feel dizzy (just when I get up quickly when I'm sitting down, but nothing serious), not pale, and not any random bruising that I get all of a sudden. And I say that Bc those are the common questions y'all would probably ask. And, I'm pretty sure it's not stress Bc I've been throwing my problems to the side. So I won't have to worry. Anyway, cn someone help, please.:)