ttc after 2 Miscarriages

Hi just looking for some advice. I am 25 years old with a beautiful 4 year old boy. I had 2 miscarriages last year and have been ttc ever since. It just doesn't seem to be happening!! My cycle went from a normal 28 day cycle to a 52 day cycle after the second miscarriage, But has just this month went to a 33 day cycle. Hoping it is a good sign and stays that way. Is there anything I could try to help getting pregnant? Or anything that has worked for you? I don't smoke and only drink on occasion and have been taking folic acid. Any replays would be appreciated xx