ttc with PCOS

My husband and I have been trying for a baby for 3 and a half years. I have had Clomid which didnt work and they have upped my metformin ( I have PCOS) and i had a period every month for 3 months which was amazinf considering i would go months even a year plus without them. I am 10 days late according to Glow so i tested today and a negative test AGAIN. Im starting to lose weight for a private appointment but has anyone been in a simialr situation and found something that helped? I take a conceiving vitamin with folix acid every day. Im starting to lose hope. x