I'm so sorry you're being pushed from one service to another at the moment. Hopefully you will be assessed soon.
In the meantime, would it be possible to have a lightweight jug of water beside the bed and a glass or mug so that you get a drink? It could be filled from the bathroom or topped up from a bottle. If you are worried about the water getting dusty, you could cover it with a cloth or tea towel.
How about a box of individually wrapped flapjack or cereal bars if your diet allows by the bed, which could provide you some energy?
I realise this involves having to shop or cook, which you certainly don't sound like you're up to presently. The sooner this assessment happens the better.
To answer Sunshines query about what a PA can do, providing it's written in your care plan, they can take you shopping, to the cinema, cook, light housework, laundry, change the bed, go to medical appointments with you, assist with paperwork etc. My PAs have done all of these things and more for me. The key is making sure that your care plan is flexible and will accommodate a broad range of activities and allow for fluctuating conditions (if yours does).