I don't know how much help this is but I'll share my experience. DS started teething a month ago and now has two part of the way in on the bottom and I think one coming in up top although its hard to see! He gets really upset out of no where when they hurt and its almost impossible to calm him down. I order this homeopathic medicine off amazon (It starts with a "c"... I cannot remember the name right now) and have used it once and it seemed to work well.
As far as sleeping, he has never slept more than 3/4 hours at a time we co-sleep so I'm no help there.