I've done those "all day shindigs" multiple times, and the waiting for that long is waiting on the lab work to come back. The doc wants all the info he can get before talking with you. I've spent more than a few hours in similar fashion, and seemingly got nowhere, so I know where you're coming from. I don't know exactly your situation, but I do know that it is stressful. We'll be pulling for you, and ready to listen to any and all comments you have. Like Sleepy says, it might be time to consider some further help. See who your pcp can direct you to. Mine sent me to a pain management specialist (which I was *very* doubtful of getting help from), and after a couple of visits, I'd learned some relaxation techniques, changed my exercise routine, and started taking sertaline, all of which has helped. I sleep somewhat better (not great, but better, usually). I've still got constant pain, and we're trying to chase down what's been going on additionally in me for the last 8 months now. I've been going down this road for over 22 years now, most of the time with that "I don't know what you have" diagnosis, getting it called SLE about 3 years ago by my hematologist, but no rheumy would say it until I went to another new one last year. We'll be praying for you and yours.
btw, do you have family and/or friends who can help? I almost have to take my wife with me to appointments, since I'm getting so forgetful anymore.
"There but for the grace of God, go I."
"... His mercy endureth for ever."