On the pill but no period for 25 days

I've been on birth control for almost a year now. It's been almost a month since my last period. I don't think I've been this late EVER. Do you think I should take a pregnancy test just to be safe? Should I be worried? Consult my doctor? 
TMI when my boyfriend and I have sex we don't use a condom but he does withdraw before he ejaculates.