Period is different then usual please help and read?

So first let me start I had sex in February with a condom he did *** but we don’t think nothing came out front condom but since then I have had my regular period about the time they should start also they usually last five days with the first two/three days heavy they kinda last like 6days last time but this time I was supposed to start the 28th on the 29th mid day I went to the Bathroom sorry tmi and I wiped it was brown hint of blood then the next day it was blood but just barely I’m still on it today it’s May 2nd but it’s so slow flowing I barely fill up a pad but sometimes I wipe and there’s a lot a blood on that. I’m not even cramping when usually I do. I may have gain wait and maybe stressed out what could this be is this normal. Has this ever happened to anyone