ugggh over this

I obviously know I need to see a Dr but I have been having really weird periods I thought was from stopping my b/c but it has been 6 months now and I've had a period last 31 days that's the longest but I skip a month or two sometimes then have a 3 week period currently I'm on 17 days and I've finally had enough I'm planning on making a Dr appointment but should I wait till I stop bleeding or not? I'm 22 not a young kid also TTC and I'm super afraid the Dr will want me on b/c that's why I've been putting the appointment off