When to start OPK post-birth control pill?

Sarah

Hi ladies! I stopped the pill on Nov 17 and then had my withdrawal bleed a few days later. Now I’m CD 48 so thinking my body isn’t back to normal yet. My husband and I are TTC and people keep suggest OPKs. Thing is, i have no idea where I am in my cycle given the irregularities from stopping the pill. Should I wait until I get a period to start using OPKs or should I just use them every day to see what’s going on? THANKS and baby dust to all!