Worried I cant concieve...

So ive told my SO that im not ready for kids which is true because im only 21yrs old but when we do decide to get married id love to try. Many women on my moms side of the family have been told by drs that they cant have kids. Well my reason for worrying is i was in a relationship last year that we never used protection and we had sex atleast 4x a week. Should I get checked out now to see if there are any issues or just wait until my & my SO decide we are ready for a family?