Suggest Treatment For High BP, Thyroid Disorder, Anemia, Dizziness And Exhaustion

I have a whole host of problems going on. Not sure what to ask first. Background infomation, I have high blood pressure and I am on two different meds twice a day, its still not under control. I have a thyroid disorder, I am on 500 mg of synthyroid, which is still not under control, I have gained 110 pounds in 7-8, I keep having low potassium and blood, i am anemic, so I keep having to get blood and potassium transfusions, light headed, dizzy, sweaty, shaking feeling, feeling faint, super tired, and now I am urinating 4-6 times a night, sometimes a little, sometimes a lot. Borderline diabetic, but the doctor does not feel that is the cause.....no one seems be be able to figure out what is going on with me. I am also a gasgric bypass patient loss 160 pounds, kept it all off for 10 years, not even gaining a pound, now all of a sudden weight gain for no reason....having malabsorbtion problems....this is why they believe my meds are not working, nor are my vitiamns or supplements....I am 47, female