I am obese weighs 115kg, A week please!

I am james , doing my MSc nursing, i have 115kg, before it was 136kg{2 years before}, that time my bp was 150/90,so Doctor told me to take Telmikind 40mg, from last 4 months I am taking Telmikind 20mg,now my bp is maintained by 100/70,110/70 Last month I consulted a Doctor for weight loss, so he told me to take Metformin 500g twice a day to reduce weight and that tablet is for insulin production,i didn't start that medicine because my blood sugar is (FBS)always 70 or 80 and ppbs 90 &100, so without having diabetes i am afraid to take Metformin, Could you please suggest me some homeopathy medicine for my problem or some medication which is for insulin production..... I am having keto diet most of the days in a week, not more than 1600 calories, walking 4km 5 days in a week Please