Prolonged Period

I'm having a problem and my doctor isn't helping. I've been having my period since April 2nd, today is May 15. I am taking the extended cycle pills. I am on my 4th week of my new pack and it's still not gone. I tried to stop taking them the weekend to see if it would go away but now it's even heavier. I'm trying to avoid going back to the doctor because they're going to charge me an arm and a leg just for them to tell me "just wait it out". No something is wrong. Has anyone ever had this problem, is there anything I can take to help it go away. PLEASE HELP ME!!!