Teething baby

Tay

So my baby is 10 months old and had her first set of teeth last month.

Since then she’s had this sleep regression it wasn’t that bad. Her bed time is 9pm but she would resist till 10-10:30. But since last week it got worse. Last night she slept at 12.

She doesn’t cry but is just so active, she does take a nap sometime after 5 pm. Is it because of that?

But how can a 20 min nap make her stay up till 12??

Can someone please help I’m desperate