I have never lived near enough to my family to ever be able to expect any help from them. Even more so when I was living abroad and had no one available in that way. My big concern in those cases were to make sure that I knew the way to the doctors and the nearest hospital as soon as possible, in case of emergencies before I had enough language to ask for any help locally. I used to drive to the hospital a couple of times to make sure that I could do it if needed. Then I also got someone to write details out and also a set of questions or how to get to a doctor or hospital, especially when I didnt write arabic or cyrillic. Fortunately never had to go in a panic state which was lucky. I used to make every effort to find at least 2 or 3 other mums in similar situations so that we could help each other out in an emergency, and we would have very simple lunches together so that the children got to know us well enough to be ok if they needed to spend a day with us.
Nowadays I am involved in a womens group, which any woman of any age can come along to, and we have a wide range of ages and even nationalities here. So at least women have a group of us who could give suggestions and help them find what they need.
I do think than Thatcher was the start of the very selfish point of view of grab grab and only think of yourself. Selling off council houses and not building more, and encouraging people to buy properties. for some people that is a sensible and possible thing to do, but with the lack of renting properties at a reasonable price, and families stretching themselves with mortgages , yet thinking that they are entitiled to have everything brand new and not wait to save for things, as we all did, means that couples can put themselves in a situation where they both have to work whether they would choose to or not. This then leads to stress and worry about money and so they then start to think of their parents , not as loving grandparents who care about their children and love them, but see them as free ,available at their beck and call, childcare.
Well it is time that some of them started to expect less and not think that they are entitled to expect it!! They should be grateful for all the care that grandparents are able to do, but should not be depending on them , or working out their lives on the assumption that such help will be there ad infinitum.
So firstly, I think you have to think about your own health, and to try and look after children when you are not well is not only very difficult and possibly could give infections to the children, but more likely that if there is anything going the rounds in children you would be vunerable to get this as well as whatever is the matter with you. Then you could end up being ill for a longer time, or possibly if you dont take care of yourself you could end up in a generally worse state of health.
Then a twofold strategy, where you team up with other grandparents in similar circumstances, and provide each other with "excuses" although you should not have to do this, but it may be easier to be able to say, "sorry I am going out with so and so, we made arrangements weeks ago" or be happy for friends to use you in the same way. Not all the time but to begin to let them see that you are not just sat waiting at the end of the phone to be used as and when they choose with an assumption that you have no other life of your own to live. Another useful plan is to look and see if there is a club or interest that you can join. I go to a weekly whist drive, which I enjoy for the company and to use my brain, whether I win or not, It is not vital and if I was really needed of course I could miss it, but it is good in both ways, that you have some interest to keep you going out and about, and then that casual assumption that you are always available is altered, as they will know that you are not free on Wednesdays or they need to ask in good time and not assume. Grandparents of the world unite in remembering that we have done our share bringing up our children, that we are of course happy to help our families but on OUR terms and not giving up the rest of our lives to wait hand and foot on the youngsters. As far as we know we only have one life, so do make the most of it, and enjoy what you are able to do, as long as health and cost allows. GN's are here to back you up if you want to post more. Good luck , that after the first shock your family will come to see that they have overstepped the mark in seeing you as an unpaid available source , and realize how lucky they are to have you.