Changes again

My doctor sent me to a dietitian last month when I refused blood pressure meds without trying to make other changes first. I've lost 15 pounds. And the doctor said it's okay because I was worried about losing so much while pregnant. He expects me to lose more. As far as my blood pressure, the top number has gone way down, but the bottom number hasn't budged. He didn't say anymore about taking meds. I hope it keeps getting better. I don't want to take meds and I don't want serious problems.