Should I be concerned?

I’ve gotten my period twice every month for the past year, I’m supposed to only get it later in the month, like between the 17th and 28th I think, and I usually do but now I get it later like usually 24th to 30th. Then I get get it in the beginning of the month too, but that’s more brown and doesn’t have as much, should I say, umph to it, like no leaking or cramps or anything. It’s weird and I don’t like talking to anyone about this kind of stuff. Is this normal or should I be worried?