Hi Hun, oh gosh 3 hour NW that is rough
Can I ask are you giving her meds as soon as she wakes up
If not I would. Have you been following her lead when she was poorly, or has there been any kind of routine in place
Do you plan to go back to 5 hours A time before her nap
TBH it does look to me like she is in discomfort so I would suspect teeth, but often there is more than 1 thing at play ie: teething and OT. If the pain wakes her the OT could make it difficult for her to resettle I guess. For the teething if you raise her up with a couple of pillows under the mattress it can help, because when lying down the blood pools and the pressure builds in the head.
It is up to you whether you start a fresh thread Hun, whatever you prefer
I'm still here to hold your hand if you want to stick with this one, but I know fresh eyes and a run down of the story so far can be helpful.
(Hugs)
x.