Urgent questions!

Hi ladies! My boyfriend and I are long distant lovers and we are going to try to conceive the weekend of Valentine’s Day! According to this app my ovulation day is feb 20 and another feb 18! We plan to BD Feb 14-18. Do I still have a shot? Starting today I’m going to start eating differently to boost my fertility. Any vitamin recommendations?? I was taking one a day but then saw that it contains soy and mackerel two things that fertility diets advise against. What do you ladies think? I’ve never been pregnant so all advice is welcomed!!!