Trying to conceive after a miscarriage

Hi ladies, 
Please help! 
I have recently had a miscarriage, the bleeding stopped 4 days ago, and now I have started to bleed again, could this be a period? 
I have put this into the calender and it then says I will be ovulating on the 18th, which is only 2 days after my period should stop! 
I'm very confused, can someone please give some advice? Should the app have updated to a new cycle??