firstly, your blood pressure is too high, you must be getting professional help. i guess if you are calling it stage 1-2 hypertansion then you’ve talked to someone but you don’t seem to have been given much information.
blood pressure is (put simply) the function of your heart rate and your vascular resistance. this means that if your heart beats faster or if your it is harder for your blood to make it round your body then your BP increases.
you have provided us with a very important piece of information. the fact that you have such a low resting pulse eliminates it as a cause and even suggests that your heart may have slowed in order to cope with the heavy load it has had placed on it.
but it can only be narrowed down so far. your high vascular resistance could be due to hardening of your blood vessels, high blood volume, a partially blocked valve in your heart or any number of other serious conditions.
do your research and find a non-condescending doctor who will tell it to you like it is. BP treatments are not as effective unless the true cause is assertained so take the time to find out.
some general principles are eat low fat, low salt, low caffeine and ephidrine may kill you. tell your doctor what you eat and how much and what drugs you take.
it would be good if someone who knew could post on possible cardio-vascular side effects of steroids.