sooo many symptoms but what is the main problem?

I am a middle aged female. I was stupidly put on high doses of oxycontin and other narcotics at a young age for chronic headaches and back pain from billiards. Ofcourse I got addicted and am now on methadone. Through that time though, I damaged my liver and kidneys. Many regrets. I never used to drink water. My liver and kidneys hurt often and I do get bad headaches with the kidney pain. They really hurt if I have to take any type of meds. Last couple months my BP is spiking, kidneys and liver are hurting with bad headaches. But the most scary thing is this tingling all over my arms and legs, like when your foot falls asleep only its everywhere. And Ive been getting these freezing spells where I cant get warm no matter what. They only last for a couple minutes but its like freezing from the inside out. I know this is a lot but I don't have insurance right now and thought maybe someone could give some advice or home remedies for stuff. Oh I do have constipation from the methadone (which is all I take now) and they thought maybe lupus at one point cause I was getting horribly sick and weak and my whole body hurt. I only had that twice for about a month. I am now realizing how very important it was when people said to eat healthy, drink water and exercise. I am young and very ill. I NEVER ate right. Chocolate all day and mcds etc. No exercise or water. I walk now and drink water and try to eat healthy but I think its a bit too late. A bit of a warning for you young ones who don't have too many problems yet.