cycle

did anyone else have a messed up cycle after a miscarriage? miscarried in October had bleeding for a week stopped and started bleeding again for two weeks had a normal period in December....according to this app I was due to start on the sixth, I took a test on the fourth it was negative but still haven't started, according to another period tracking app I have it says I'm due to start on the 17th so I'm not which app to go with on when flos due again.... anyone else have issues like this before? we are trying again after the mc...