I did not ovulate this month

prog levels read 1.35, the lowest it has been sense clomid. I have noticed a pattern tho, started clomid in Nov-50mg's and ovulated levels 11.2 , Dec-50mg's no ovulation levels 2.54, Jan-100mg's ovulated levels 10.96, Feb-100mg's no ovulation levels 1.35. Seems like I ovulating every other month. Dr is upping March to 150mg's, and I pray it works this time b/c I think I may stop after this month, I am an emotional wreck. And on top of it all I think my Dr sux, she just now tells me I should be taking folic acid while ttc!!! Thanks alot 4 months into it and now u tell me????? Just wanted to share w/ u guys. Thanks for listening and any suggestion/advice is appreciated.