I AM FAT 61 YEAR OLD WOMAN!

i weigh 173 lbs....my measurements are 45-39-39 1/2. I can still remember when i was 32-22-34 as an adult. Why? AAAAaaaaaarrrrrrgh! I don't want to do Nutrisystem again cause i whited out the last time. I am on blood pressure medicine and i have to be careful. Any suggestions?