Hi, I'm almost 30 and just completed my series. I also had a LEEP done last year due to HPV, and the doctor thought I should get the vaccination just in case I come into contact with a different strain. My theory is, it can never hurt.
Anyway, I got it done at his office- he ordered it for his patients- many of whom had HPV and are now testing negative. Anyway, I don't know if it was relaly worth it, but you CAN get it through your obgyn. It IS expensive though as your insurance will only cover it if you are under 26- awesome.
Anyway, best of luck to you!