Sloany, I have regulated my period seccesfuly with the drops called agnolit. This is a hurb in alcohol, I don't know another place than germany to buy it. It was very dificult for me to get it, but I succed to use it for 2 years 40 drops a day, as recomended. My perriod is regular now, no pain. I know 2 women getting planed pregnancy very shortly after starting for a baby.
Still - can be hundreds of reasons for a missing pregnancy. Depending on your age you should try getting pregnant and if now success within 2 years, start with doctors. I have a long history and experiance - trying to get pregnant since 1996, many abortions, one delivery, 4 spontanious pregnancies and 6 invitro atempts - still no child. I will keep trying till my age allows.
Good luck to you and get as much info as you can