Hello, Hypertension is a very common disease and nothing to worry about if it is kept under control. Since you developed it during pregnancy there is a very remote chance that you may become normal again. Any form of exercise as well as yoga are beneficial for BP since they cause reduction of weight, which contributes to BP reduction. As for lifestyle changes, try to make morning walk a part of your routine and some other forms of exercise like swimming or jogging would be great. Salt restriction is the most essential part of diet measures for BP reduction. Also try to avoid excess fried foods and red meat. Fish has shown some benefit in hypertensives. Hope you get well