@justgettingthroughtheday
I am very sorry you have serious illness, especially if NHS treatment - or lack of - have contributed to late diagnosis and the position you find yourself in facing cancer and hysterectomy as part of that treatment.
I say this with all sympathy and I hope you won't feel patronised.
You are angry - those feelings are natural when life deals you a shit hand, especially if medical fault is a part of the problem. It is also natural to displace that anger and ignore your fears by trying to focus on something else, perhaps something that offers hope for the future and the chance of the life you thought you would have.
But at the moment, facing major surgery and possibly more treatment after that, you really need to focus on your health and your mental health. There are lots of cancer charities such as Macmillan that can advise or offer counselling if your hospital won't provide this.
Now is really not the time to be pursuing your dream of motherhood. The reality of this might include upsets if your friend who is your surrogate mother has a miscarriage or fails to get pregnant or other complications. Your rage will put unreasonable pressure on her.
And if you do have a baby, you need to be in good health to make the most of motherhood and care for your baby. Not stressing about childcare while you attend hospital appointments and feeling too rubbish to get up in the night to feed the baby.
No one would be allowed to adopt in this situation and I really think the same reasons apply to having a baby through surrogacy.
You might think it a poor comparison but we got our last dog as a sixteen week old puppy, the reason being she had been returned to her breeder at 14 weeks. The son of the people who had bought her at 8 weeks was diagnosed with cancer soon after and they suddenly found themselves spending days driving up to the Royal Marsden frequently and caring for a poorly child. It wasn't the time to have a puppy and they did the right thing by her, letting her be rehomed to someone who had the time to devote to her.
Exactly the same principle applies to the baby you hope to have.
I really hope your operation and future treatment goes well for you. Please just focus on yourself for the time being. 