Hi there, I have been taking Depo Provera for a year and a half, it'l be two years in June 2014. Is it OK to continue using this birth control after two years? I have very heavy bleeding so my doctor put me on it and it works so well for me. I have no problems whatsever.

Yes, it should be okay to continue using this method. Just remember though, that once you are ready to get pregnant, it could take upwards of 2 years to be completely out of your system.