Who is good with BBT charts? Someone come and look at this

Ok so I was 6 weeks pregnant when I started miscarrying on september 8th which lasted 8 days long. Glow said i would ovulate on the 28th. I got just ONE test that looked positive on the 27th (tested 3 times that day). I say just one because normally my opks are blazing positive for 2 days when im ovulating but i just had the one. I know my chart says positive opk for the 28th but that was a mistake and it wont let me delete it for some reason. I got an insight from another app im on that said "you have a spike in bbt which confirms you ovulated recently" but the whole chart is full of spikes so im confused. Can someone tell me WHEN and IF I ovulated? I have had pretty much no cm since the miscarriage and im thinking maybe my body is trying to get back to normal?