I had a Chemical Pregnancy in March - tested positive a couple of times then my period arrived one day late. It was just like a normal period - if I hadn't tested early I'd never have known.
My cycle wasn't disrupted - I didn't have another period as I went on to fall pregnant, but I know I ovulated not more than two weeks after the 'CP' period as we didn't have sex after day 13. Unfortunately that pregnancy ended in a mmc diagnosed 3 weeks ago. I have no reason to think the CP and the mmc were related in any way and the doctors say no and they're both just bad luck.
Sorry to hear about your CP. I had one a couple of years ago. The only reason I knew was because I just happened to go to the gynaecologist about not getting pg, she did an internal scan and found a sac. I started bleeding the next day .
The bleeding lasted 13 days in total, and I assumed that my body would be all over the place so we stopped ttc. Funnily enough we conceived anyway, and my DS is now asleep upstairs . I have no idea when I ov'd so I can't be much help with regard to when my period would have been due, sorry.