Miscarriage at 6 weeks

How long did it take for your hcg to drop after a miscarriage at 6 weeks? My levels had dropped down to 275 last Friday (26th Aug) and were more than halving each time when I had bloods done that week every 48hours. Did a test on Thursday 1st Sept and it was still blatantly positive.

Also, can you still ovulate with hcg left in your body? I know my cycle can be anywhere after a miscarriage but trying to get an idea of when I can start TTC again without the confusion of leftover hcg if I was to fall pregnant straight away. It’s taken us 2 years this time to get to this point so I just want to get started asap. Thanks.