Anyone else driving in their sleep? I'm screwed now...

I’m really screwed now.  I got arrested in Michigan after I drove off the road and totaled my truck at 4AM.  I was totally uninjured, luckily, and the only thing I hurt, besides my truck, was a ditch and a tree.  Unfortunately, I have no memory of the accident or anything leading up to it.  I went out for dinner, had a few cocktails with my food, then went home and went to bed.  Next thing I know, I’m cuffed in the back of a police car 20 or 30 miles away from home… I don’t even know anyone anywhere near where I was driving.
I’m taking Vicodin – actually I just switched to Oxycontin, Tramadol, Flexeril, Neurontin, and Pseudoephedrine.  I am taking the maximum allowable dose of each one of those meds.
I know it was stupid to drink with all the meds I’m on, but I didn’t think a few mixed drinks with dinner would hurt anything.
Is it possible that I got up in the middle of the night, drank more alcohol, and then went out driving?  And that I did all this without remembering any of it?
The meds I’m taking are scary enough; now I have to worry about getting up and doing crazy things in my sleep and not remembering them?
This has got me really scared.  Has anybody heard about things like this happening from any of the drugs I listed above?  I heard about things like this with people who take Ambien, but not with any of the drugs I'm on.