Ladies question about DNC?

I have been off the birth control for 3 1/2 years and still not preg.I have cyst on my ovaries and I heard that can be a factor depending on what they are doing if they broke or not.Anyways I heard that if i went for a DNC that it might help to get preg.And yes I have been in a steady relationship and getting married and of age I am 24 and really wanting to start a family but starting to get worried.I know its not him he has a daughter from the past relationship and I had a misscarrage 7 years ago. can that be a problem? But can a DNC really work?