Suggest Remedy For Irregular Periods

I m 24 years old.My periods are irregular.For the last 10 months I have been trying to concieve.I have been diagnosed with pco and prescribed 1500mg metformin and 50 mg clomid for the first 3 cycles and 150 mg on 4th cycle.On day 13th ultrasound my follicle size is 12mm and endometrial thickness was 5mm.on that cycle my periods came after 32 days.My husband was also diagnosed with poor sperm motility.Now i m taking only metformin. Is it difficult to get pregnant with this endometrial thickness and this follicle size