Lamictal Rash

After 6 months I have broken out in a horrible rash....I thought that only happened when you firs start taking....My doctor has pulled me off 200mg a day cold turkey...I feel like there are needles coming threw my skin...I am passed itiching almost to the point of what I would call painful... I have been off the drug a good 48 hours....When can I expect this to stop...What should I do in the meantime to make things better I am climbing the walls...I have to drive 5 hours on Sunday...something has to give Benydrl is no longer working... Thanks....