Try first, maybe...
Healthy couples typically won't need fertility
tests before trying to conceive
(80-90% will do so after one year of regular intercourse, 2x/week).
After a year of "trying" with no success, then see a fertility specialist. If you have medical problems requiring chronic drugs or that potentially decrease fertility, or you are likely to have a "high risk" pregnancy, get an OB doctor now & get advice.