Cplj, I'm 66 and the complete opposite of your mum. I did have a very needy drama queen for a mother, though.
The thing to bear in mind is that her behaviour is attention seeking and manipulative - although maybe not deliberately so. The more assistance, concern, sympathy and time you give her - the more she'll demand.
You will also justify (in her mind) and increase her future neediness by readily accepting and responding to it.
My mother believed she was frail and delicate (it started in her forties) so couldn't walk far or even lift a heavy tea cup. She needed paid help with housework, gardening, shopping etc. and was totally self-obsessed. Therefore, she craved reassurance and daily attention/assistance with every little thing.
In the real world, her problem was anxiety. She was as strong as an ox, despite never exercising, healthy (with minor BP and allergy issues) but spoilt, self indulgent and very lazy - and lived to the age of ninety.
She made my older sister's life absolute hell with all her demands (wanted her, not myself or my brother) for over fifty years.
So, protect yourself first! Distance yourself emotionally. Try referring her to sources of help outside of family. Start with suggesting a GP appointment as she may well need medication for anxiety or depression.
Contact social services about any neighbourhood or phone assistance and companionship schemes. Keep your own interactions short and sweet by reminding her how very busy you are!