ovulation test help!!!! please!!

hey ladies. I had a chemical pregnancy on Tuesday September 8th, which is when the bleeding started. I still have some spotting but it's nearly over. i was only about 4 weeks and 3 days, nothing even showed up on the ultrasound and my hcg was very low I had very faint bfps... yesterday and today I got positive ovulation tests. I know it's not leftover hormones because the two days prior the ovulation tests were negative. it's a digital test too so I was not interpreting it wrong. I can't believe I'd be ovulation so quickly! has anyone else experienced this after a chemical or miscarriage? will I ovulate again during my normal time? does this mean if I don't get pregnant this cycle my period will come 14-16 days past the positive opk?? thank you all!!