I Had A Colonoscopy On Thursday Morning, And Seemed To

I had a colonoscopy on Thursday morning, and seemed to have a bit of residual "brain fog" on Friday. I am still struggling with it today -- and it is starting to concern me because I have MS. This is my third colonoscopy in 10 years and I've never had this issue before. They used propophol (sp?) 5 years ago as well as this last week -- I don't recall having brain fog last time, but I do this time. One additional factor, is that AS they were injecting the propophol (sp?) I had a VERY odd sensation in my head before falling asleep. Should I be concerned -- is this a commons side effect that will/should go away soon?