Help please

Mikaela • 23 Latina from Massachusetts. In a relationship for 4 years and counting love my So very much 💗
So i am 22 years old my Af are 20 days apart its so annoying im trying for a baby and nothing:( it makes me sooo scared ! Is 20 days in between period bad? Did you have this and gotten pregnant or should i get checked out? I been having unprotected sex w my fiance for 3 years since i lost my virginity To him & never gotten pregnant now that i want to its not happening i can't see my doc till march so i have to wait till than to get test done & all makes me want to cry 😒