When to conceive

Magen • I'm 28 •I have 2 boys 2&7•
So I got my mirena removed last yr I think maybe 8-9 mos ago and now that we r ttc (only since oct) and with my AF all over the place dif dates of every month, any advice? Should we BD everyday, since I don't know if my ovulation days are correct. Btw I don't want to use any ovulation kits until we hit the 6 month mark of ttc and don't succeed! Help me girls!! Thx! ✨??