Cycle is off after miscarriage


Good morning.

I came off of my birth control last August and have been ttc since October 2017. I got pregnant in April but sadly miscarried at 5 1/2 weeks. My cycles since coming off the pill were 36 days long and I ovulated around cd 21. Since the miscarriage they have shortened to 30 days and I am ovulating around cd 18. My question is has anyone ever experienced this before? I prefer the shorter cycle because it gives us a better chance of conceiving but I'm not sure if it's something I should talk To my doctor about.