Ovulation timing

Melissa
I was just wandering if anyone would know when I should start ovulating, my period just stopped on the 17th and it lasted for 5 days. I just bought a fertility medicine called fertility blend. I was wondering if anyone has tried this medicine and if it had worked for them. I posted a while back that I had a tubal reversal in 2010 and I haven't had any luck with pregnancy. I also got pre seed. So please any answers to my questions and concerns. I'm more and more depressed every month, when I think I might miss a period, but my luck and hope leaves me very discouraged. Please if anyone can help answere some of my questions with this topic it would be greatly appreciated. Prayers would also be nice. Thank you, Melissa. :)