((HUGS)) I am sure you are exhausted. I wouldn't just put her to 1 nap though, since those 4 am wakings may continue as a result of being OT.
That last A was probably too long. What did your day look like yesterday?
I would put her down for 1 hour at 8:30 and then a proper nap between 1/1:30. If you think she is going to get a 2nd short nap on a 1 hour nap, then I would limit the first nap to 45 minutes and aim for 8:45-9:30.