FTC after 3 miscarriages 1 chemical

At 36years old I had 3 living boys all 5 years apart no complications no issues. When my youngest was 9 months old I got pregnant that was miscarriage followed by another miscarriage then a chemical and then a miscarriage. All testing came back normal. The last miscarriage was trisomy saw a geneticist. Went on birth control for 6 months ended birth control at end of August and have been ttc since. I turned 37 in October. The last 2 month I tracked with opk. Realized I was ovulating earlier than my app said. So this will be my 3rd month tracking ovulation. Anyone with similar circumstances or have advice or encouragement please.