Ovulating after a chemical?

Very sadly having a chemical at the moment! I started spotting brown on 2nd Sept and went to full bleeding on 6th Sept. I understand I could be bleeding for some time, any idea how long this usually is?

Also when am I likely to next ovulate?

I’ve tested my LH as I don’t want to miss any chance of conceiving again and it’s really high. Would this still be from the pregnancy?

Thanks in advance!