Yeah, I would either try a nap or you could try an earlier bedtime for a few days to let her catch up.
In regards to the "demands", my Isabella did the same. What I ended up doing was talk to her about night time and that if she wakes she can call and I will help her with what it is she needs the 1st time but she needs to try and get back to sleep on her own thereafter. We had calls for water/potty/wipe tears/cover me with blanket/put my socks on as well. For water, I put a sippy cup of water by her bed as well as a box of tissues. I also put a potty into her room (sounds yuck!) but it actually stopped the never ending request to want to do "one more pee" and she's only used it in the morning a few times for a wee before I come and get her. For blanket, I ask her to show me (so we practice) how to cover up during the day... this way I know she can do it by herself at night as well. For socks, I also practiced with her during the day how to put her socks on at night.
She has a nightlight so that she can see what it is she is doing/she can find her blanket/her teddy (we have about 3 in her bed at the moment)/see her water/see the tissue box, etc...
I have one more nightlight which is on a timer and I tell her that its not time to call me/wake up until that nightlight comes on.
So with nightwakings, I would go to her and see what she wants. Help her and leave. If she calls you back go to her and tell her its night time and leave. Then do the wi/wo (so start counting to 5 or 10 or 15 and then go back to her for a quick comfort if she's still crying at the end of your count). From then on no talking (so with the 1st call you do what she wants & tell her its night time; the 2nd call you tell her its night time & from then on no talking other than repeating "its night time, go to sleep"). Repeat and in time she will absolutely get the idea that its sleepy time, and that even if mummy comes to me, she will not give me attention so there really won't be a need to call her!
Is she still in a cot or is she in a big bed?
Layla