Advice for ladies who's ttc!!!

I had a miscarriage after ttc for year and half in july!! Me and my husband started ttc again from aug. I was supposed to get my AF on Nov 15. Tested on Nov 14 got my BFP. Here is a very simple tip: we didnt try who month or every other day during fertile window! Since i was supposed to get my period on Nov 15 , LMP was in oct 19. So we only used the ovulation kit on 4 days and when we got the flashing face and solid thats when we did BD. Which was only on Nov1, &nov 2. We are 4 wks and5 days pregnant!!