I been for a while wondering if I should post or not, and today it seemed like a good day to do it. I had a m/c about 2 months ago and this month we get to try again. I'm excited about it but very scare

It's been hard to figure out ovulation since my period have been al over the place in the last two month-I always been very regular. Has anyone have any advise on how to keep hope up?
I don't want the same thing happening again...
Thanks