Bleeding every month!!

Hi everyone. I just wanted to ask if anyone is in the same situation as me. My cycles are 35 days and I always get my period. However, once my period has stopped, I always goes one week of no bleeding and then I start light bleeding. It's happening almost exactly a week after my period every single month. I've had tests and scans and nothing has shown up abnormal. Does anyone else suffer from this as well? I've been ttc for over a year. Thanks!!