B1rdonawire well firstly I go on mumsnet a lot and realise loads of people are worse off than me!
I also have 'naturally' high bloody pressure which is now pretty much text book as controlled by pills. Don't solider on with illnesses, always get the right medical help for you just as you would for your child.
Swap sugary foods for naturally sweet or creamy, tomatoes, avocado etc, as you eat more of the natural the natural will taste sweeter as your taste buds calm down. I am still trying to get the hang of this (I love sweets!)
For me I love tea, it calms me down and gives me vitality. If you want to be fancy try herbal, chamomile, Jasmine, whatever.
I love hot bubble baths and watching my favourite TVs shows (The 100, and the Good Fight in my PJs!)
I love chatting to friends on the phone.
I love Taekwando which I do at a class.
If you cannot get out in the fresh air make your home as echo-friendly-outdoorsy as you like, flowers, plants, sounds of the rain forest etc.
Get out when you can, at weekends, or to the park after school.
My kids are total home bodies who love TV and shun the park. So sometimes I make sure we have a play date in the park.
If you can cultivate new mummy/daddy friends who can come over for coffee and chats, I find this helps. But if you crave peace then make sure your child goes to bed as early as is reasonable and make your evenings your own.
Basically, all the things that energize you, find a mummy/lone parent version of them.