I am sorry that seems really tough for you . You say that one of your jobs is public sector and they are making some redundancies . Is that across the board and I assume there is no prospect for you to get a full time job there , even if it means you moving to a different department ?
What about your DH’s job , is it possible for him to look for better paid work ?
I think you have been through a lot and need to prioritise your health , although easier said than done when the bills have to be paid .
Do you have an employee assistance programme with your employer ? If so it might be good for you to see if they will offer you some counselling .
I think it would be quite difficult to bring a new baby into the mix when you have a lot on your plate . Is that something you could put on hold for the next year , whilst your body recovers ? Can you speak to your GP about anything they can suggest for your ongoing symptoms ?
You say that you enjoy your SE job , but that it is physically demanding . Does this impact on your physical symptoms ?
It sounds also that you are in a challenging phase with your three year old ‘s sleep and that is putting further strain on you and your DH . Is there any family close by that could help with some baby sitting to give you and your DH a break ?
You aren’t failing at all these things , you have gone through a very challenging time having gone through cancer . I think you just have to look at what might give you some short term relief rather than trying to solve all your issues at once . I really hope that things improve for you soon and you take care of yourself .