You should ask a Doctor. That's a long time to be w/o medication. Because this has happened you can probably ask any medical Dr. for advice and they will prescribe the proper dosage for you until you see a psychiatrist. (I did this when I moved and didn't have a psychiatrist and needed some zyprexa. I went to a local internal medical Dr. and he prescribed a small amount to keep me going.)

I wouldn't fool with lamictal dosages if you've been without for 5 days. Let a Dr. give you advice on how to get back on it. If you take it improperly and get a rash it can be very serious. (fyi: The first 6 mths is the most crucial for susceptibility to the rash.)