TTC baby number 1 going on 41

Hi. Any advice on how to improve TTC without the use of ovulation tests as too costly on me and having sex every second day after AF ends. My AF came three days early this month based on glow app and honestly might be too much but much heavier than usual and I am in bits. Bad cramps and alot of bathroom visits. I have attached my cycle record. Normally fairly light but hit this time.