Please help me!

So I started my period on the 7th, which is right on time, and the bleeding was normal. It was heavy on Thursday, but on Friday there was no blood, just brown discharge. Then on Saturday there was a little blood but mainly when I wiped. And today, I only had blood when I wiped, but sometimes it would be a brownish red color. Usually my periods last 5-6 days and have a constant bleeding with 2 heavy days. This time I only had 1 heavy day, and the rest of the time I only had blood when I wiped.

Has this happened to any of you? I've never had this happen, so just wondering if anyone knows what it could be.