dying for caffeine

it has been 4 months since I have had any coffee or anything with caffeine and the headaches just come and go. the first month in the pregnancy of no caffeine I was ready to die. now I'm in my 4th month I feel the headaches are coming back with a vengeance!!! anyone else doing the whole no caffeine during the pregnancy?! it was my choice I've had a horrible year of cola and the year before that i put myself in the hospital for kidney failure ( close to failing ). trying to keep me and rainbow baby healthy and happy