My Period went from Cycle 39, 51, 53

Im just soo confused on my cycle ! What could be the cause of this? I am an athlete and I had a UTI before which I kindah still think I have the doses my doctor gave me I don't think it was enough !  Anyways I my last period way may 7 I thought I was gonna have it June 8 which will be 33/32 days of how my old cycle used to be . But these past couple months my cycle been very different ! I don't even think I'm ovulating during these months . I'm gonna take a test at the end of this week if I don't get my period ! But moral of the story why is my cycle soo long ?  And also my last period was soo heavy it was leaking down my leg the next morning ! My period is never that heavy it's usually medium/light. I NEED ANDWERS !!!!