Migrane And Trouble Eating...

Well first of all I just joined, so hello to everyone.
Well, first things first, I was diagnosed with Pseudo Tumor cerebri about 8 months ago - it's basically a "false tumor" when your body produces too much spinal fluid and it puts pressure on your brain, causing your brain to think that you have a tumor. They have me on laxatives to help reduce the amount of spinal fluid pressure in my brain - I am currently on lasix (which doesn't help the headaches at all, I still have a migrane 24 hours a day 7 days a week). I also take an obscene amount of over the counter pain killers because my neurologist doesn't like the idea of me taking a prescribed pain killer. On a daily basis I take about 4 doses of 5 ibuprofens, about 2 - 3 doses of Excedrine Migrane, sometimes taken with the IBU's and sometimes not, and I take 2 pills at a time of those, then at night I go to sleep with 2-3 tylenol p.m.'s and I usually wake up around 3am and take 2 more. I expressed how many pills I was taking to my doctor and my concern, she had told me that taking more than 2 doses of a certain pill a week can cause the pills to do a reverse effect and actually cause you headaches, I was told to not take anymore over the counter pills - ever - and it would be like a meth addict going through detox because I have come so dependent on these pills. Well, she told me this about 3 weeks ago, I tried going one day without anything, and it made me sick and I was desperate for the pain to go away, so to this point I have been un able to stop taking the over the counter medicine.
Now, for about the last 5 days I have been waking up at around 330am and throwing up and dryheaving, with sharp pains going from my belly button up to my breast bone, it feels as if someone has a grab on my stomach and is squeezing it as tight as they can. It causes me to lie awake for hours on end in excrutiating pain, trying to cry myself to sleep. The pain continues during the day, I can still do some daily tasks without interruption except for when it comes to eating - when I try to eat my stomach does the squeezing thing once again and I can't swallow. Everything else about my body seems normal, my bowels, I have no fever so it couldn't be the flu I'm sure, nothing else seems abnormal. The last 2 nights I have wanted so badly just to drive myself to the ER because the pain is so bad - I thought I may be pregnant, so I took a pregnancy test and it has come up negative. Does anyone have any ideas? Your replys would be greatly appreciated.