Miscarriage after 12 weeks?

Ashley
Has anyone ever had a miscarriage after 12 weeks or know someone that has? And Why did it happen? Was baby moving and good heartbeat?
I had a miscarriage in March of this year at 11 weeks and I have been a friggen wreck this whole pregnancy, I am currently 13 weeks and only feeling super crampy. We saw baby last week she was kicking around and heartbeat was 150. Maybe just looking for support or reassurance that my baby is going to make it this time since I have gotten to 13 weeks...Dr said she was big for her age an I'm hoping that means she's healthy but I can't help but to worry everyday. I desperately want to enjoy this pregnancy.