Period problems.. ima see a OBGYN but I just to see what y’all think.

At 13y/o I started my period but I was spotting brown, no cramping and it just stopped. I’m 24 y/o now and suddenly my period started back kinda regular but irregular no cramping slight bleeding I would have like little chunks of blood clots and my period would only only last maybe 1 day or 2 days.. then it’ll stop for couples days and start back and week passed by my period I had I was cramping and bleeding mild lasted for 4 days but slightly ease off.. idk what’s wrong I will cramp here and there at times but nothing I’ve never been to the OBGYN cause I don’t have the money and they charge a lot.