Mrs B - Now I'm going to have a nag!!!
I think that you really need to put a post on here BEFORE your do anything, and we can all take a look at what you're proposing, and perhaps offer advice on a) whether you should attempt it at all: b) If we think it's wise for you to carry on, maybe someone here will be able to let you know the best and safest way to do it: c) When you do start work, then make sure you have your mobile phone with you, just in case you need immediate assistance, and of course d) If it's obviously too much for you to attempt, then the recommendation will probably be to sit down with a cuppa and leave things alone until you can get the appropriate help.
Nag over - but please take it easy for a while before you do yourself some damage that can't be put right.
Sending you loads of sympathy and a big hug!