Welcome Hound and Crystal
Hound I know how daunting it can seem to not have food in and no way of getting any. When we were really broke I would go through the cupboards and freezer looking for meal "anchors" - sardines, tuna, ham, chorizio, bacon, anchovies, cheese... something to give the food flavour. Find a flavour carrier - tin of tomatoes, milk & flour for a white sauce, oil, and then a bulking thing - pasta, potatoes, flour, rice, cous cous. If you have herbs and spices in then you are ok.
You may end up with seemingly odd combinations. My usual go to ones are
-grilled sardines flaked through pasta with a dash of olive oil (pesto and / or garlic if you have it)
-Kedgeree - rice cooked with curry paste / powder (paella method - fry and add minimum amount of water) add in flaked smoked fish / tuna
- dahl - a store cupboard cliché but for a reason
- anchovies in tomato over pasta - you can even use the oil in the tin to fry any garlic or onion you have.
If you have flour (any type) you can make soda bread / flat breads / cakes (vegan cake recipes are your friend... you can use vinegar and oil instead of eggs and butter)
Jack Monroe has some really good recipes on their website. cookingonabootstrap.com/
As wolf says a referral to a foodbank is a good idea. Some independent foodbanks take self referral. Many are listed on this website www.foodaidnetwork.org.uk/.