I am obese, relatively fit, and 102 is my systolic blood pressure. If I had 102 diastolic, I would go see a doctor right away. Losing weight may or may not lower your blood pressure. I agree that it is now the least of your problems. You put too much stock in the number on the scale. That level of hyperfocus can leave you blinded to other and more important issues and lead to obsessiveness. If you absolutely cannot imagine living without having goals in terms of numbers, get a baseline Dexa scan and start working towards improving your muscle mass and bone density, slowly. It is a much more worthwhile pursuit that just lowering the number on the scale which can actually come from wasting away muscle tissue. But all of that is longer term and your currently being sick and hypertensive is an acute issue requiring medical attention.

With your mother saying you pay too much attention to your health, it is a boy who cried wolf story. Right now, your hypertension is a real wolf. You need to be seen.