Hi Happy, sorry to hear you're struggling. Mine also took 6 months + to return after coming off microgynon. It was incredibly frustrating and I felt it would never come! My periods are still very irregular but I'm finally getting somewhere.
Definitely go and see your GP, they'll probably do some initial tests and possibly prescribe you progesterone to induce a bleed.
Fingers crossed it will come back by itself, but the GP should do something now it's been 6 months.