2 failed IUI's

Just wondering... How can I conceive naturally if I went through 2 very timed IUI's with meds & injections & timed intercourse? Doctor said average is 3 rounds & then on to IVF. Cannot afford IVF & at this point am taking a break from immediately doing round 3 of IUI. My body & mind needs a break. Loding hope since IUI didn't work