Period

Ok so.. I went to a gynecologist about a year ago and she said I was clean so Idk if I should be worried or not but so my period is really weird the past 4 years.. so the first day of my period my blood is a normal color of red, normal thickness, healthy seeming. But then the next 6 days its a really dark brown... and sometimes theres clots... I'm scared to talk to my mom about it because we don't have money to go in again..