ovulation on clomid

Laura

i had took clomid when inwas 29 and it was successful however now at 34 i seem to take a dose then my period wont come i did a higher dose one time i ovulated but the last time i didnt...my question is has this happened anyone? im on 150mg i was wondering if i ha e to go to the next step which is fertility clinic and what is the next least expensive option after clomid?