Fertile issues...

Claire
Okay... Every single time I enter that "fertile window" or like a week or so after my period I have bloody and brown discharge... The whole time... 
​Has anyone else experienced this? 
​What did you do? 
​Does this mean I can't have kids?( I'm jumping to conclusions I know but... That's like my life dream I want to have like 7...) 
​Anyways.. Help?!?