Clomid advice...

I came off birth control 17 months ago, hoping to start a family. I didn't have a period for a year so went to see my family doctor. I was referred to a gynaecologist who put me on 50mg Clomid days 2-6. This was unsuccessful and so it was upped to 100mg, which worked and I ovulated with no bfp. Second and third round of 100mg were unsuccessful and I didn't ovulate. I have now been prescribed 150mg to try for a couple of cycles. Feeling really fed up with it now as it has worked once but then not since. 

Anyone else going through similar experience? X