Success With Fertility Blend and Prenatal Vitamins?

Although my cycles vary in length from 28-32 days I appear to be ovulating and have been able to pinpoint my ovulation 2 cycles in a row (so I thought of Vitex but realized I prolly don't need it). We are 23 & 24 yrs old and have been trying for roughly 4 months (almost 3 out of those 4 I could attribute to bad timing). This time I thought the timing was okay, I had EWCM on the 24th--June, and observed OV on the 27th. We BD 27th-29th. (Even though Mymonthlycycles predicted me to OV on the 3rd--July. I haven't ever been on birth control or anything like that. We haven't been trying long at all I know but how many have had success with Fertility Blend and Prenatal Vitamins?