@Imbluedalale Your Spoonies Army are all making very valuable points. You still have the narrative in your head that all the bad things are your fault, because it's what you have been indoctrinated to believe. Totally understandable because it's going to take time for you to corral the inner voice that's being destructive. We all have one, but you've been forced to believe everything it says is gospel by the other people around you. It's not going to change overnight but eventually you will be able to tell it to be quiet. None of it is your fault whatsoever.
If it was possible to cause someone to have high blood pressure purely on stress, you would have popped like a balloon by now!!
There's usually some physical thing that needs medication and management, when someone has consistently high blood pressure. Hopefully she has support from her doctor to control it. Your dad is naturally being protective towards her because he's worried and sees how it affects her as he's living with her. He's less aware of how affected you are as he's not there all the time. He's also used to thinking everything is fine.
Your mum does need to avoid unnecessary stress, where possible but that doesn't mean you can't talk to her about how you are feeling. She's not going to stop worrying about you, just because you don't tell her. It can be even more stressful knowing that someone isn't ok but is hiding it from you. Our brains are very good at going to the extreme and imagining the worst when we don't have information.
One way to try to minimise the stress for her is to try to have a plan of action or something positive that you are working towards, that you can talk about it with her. So she doesn't feel like she's got to try to solve the situation all the time. It will give her confidence that you are moving forward and not stuck in a bad place. It's also really good for you, because you have something to aim for. It doesn't have to be big. It could be as simple as, "This week I will plan to cook most of my meals at home, so I know that I am getting the nutrients my body needs to heal". Or I'm going to take the photos of my house and get them printed so I can add them into my scrapbook. Then each week I am going to look at a photo and write down the things I really like about it and how much I enjoyed choosing X bit of décor.
Try to choose something that you feel confident is possible. Preferably 7 out of 10 or more, on the confidence scale. This stops you from always trying something that's unattainable. Have a deadline say a week or two in the future, where you can look back and see how you got on. It's ok if you don't achieve it, just celebrating the bits that did work and learning why the other bits weren't possible, is still valuable. When you catch yourself thinking poorly if yourself, think about what you would say to one of your Spoonies, who didn't manage to achieve their goal. You deserve to be treated as kindly as you would treat a friend.