I agree with JessicaHarrell...don't hop on the IVF bus unless you have to (I'm doing it now...it's a lot to go through)...there may be other options that are far, far less expensive and just as effective for you, especially since you are younger. I'd try and get some bloodwork done ASAP so they can screen for some factors. I started with my gyno and went from there...keep us updated!
Have you tried Femara or clomid? I have PCOS and fail to ovulate. No periods, missed periods are common for me as well. The doctor can use ultrasound and blood work to check for this. I used clomid and got prego with twins first try, I am now using Femara to try to for another. Your doctor can use Provera to help you start your cycle as well. I would make an app. asap. You have been trying for a year now so they should help you. You might not need in vitro at the point. There are other opptions that do not cost as much. Don't give up! It can still happen for you. Call your Doc, and search the boards for others that have been blessed after years of trying. These boards can restore your hope. You see people that try for years, and then get blessed. Best wishes and baby dust for you!