How long?

I'm currently suffering a miscarriage and still bleeding. 
The surviving women out there reading, how did you bleed? 
​And how do I know when to start again regarding cycles and ovulation?
​Do I take OPKs?
​Or do I wait?
​I've no idea where to start now :(
​I'm so educated in every other area but so lost now. 
​Thank you in advance for your stories and insight. 
​All the best wishes for the miracle we all need x