Crikey, quite a few similarities with my own mother.
She's also 95 although she lives alone in her own house.
She sleeps late in the morning and then is ready to have a nap about 2 hrs after she woke up!
After a prolonged hospital stay due to a fall I employed the use of private carers as I had lost confidence for her to be safe alone.
Over the last two months she has developed a fear of falling out of bed and she has actually done exactly that about 4 times.
I have since made some adjustments which I hope will work.
Mum has a habit of going to the loo multiple times a night but the latest carer said she was pottering about in the early hours too.
Due to the cost of private care I had to remove her daytime care package but this resulted in mum being very disorienated after waking (either from her night's sleep or afternoon nap) and I have had neighbours ringing me several times telling me that she's knocking at the window for help or at the front door (which is locked for her safety)
She was on memantine very briefly but the nurse withdrew it from her due to concerns over mum's BP so consequently she's not on any medication at all now