Poor you.
My blood pressure has been out of control and I now take two meds daily.
You MUST take the pills to get it under control, then you can work out your options.
There are a number of things that can raise your BP, your kidney disease is the obvious one.
Four children - well you have my admiration but there must be some stress.
Do you drink? Alcohol is another thing that can put your BP up.
I know how you feel re medication, I was diagnosed with arthritis at age 26. For me the medication meant that my pain reduced. But I know that you don't feel your BP being high so the medication does not give you 'relief' - sorry couldn't get the right word.
How much do you want a fifth child?
Blood pressure meds work in two ways (which is why I take two) one acts on the receptors that tell your body to increase BP. The others are diuretics. You probably know this because of your kidneys.
Now please talk to your Dr if you consider this. You can take natural substances that have diuretic properties. The most common is dandelion - there is a reason it is often referred to as 'piss the bed'.
I do not know what effect a natural diuretic would have on your kidneys which is why you need to talk to your Dr if you are considering it.
Please discuss options, HotelTango has been more or less where you are.
Get your BP under control with the meds, do anything else you can to get it under control via diet /exercise then think about baby no 5, and find out what your options are.
I know this must be devastating for you, and you would probably slap me if I said this to you IRL but you have 4 children. If you can't have a 5th you still have 4.