Ah, Kelly...wish I'd been on here when you had your questions beforehand.
I had an IVSM last month. One thing my neuro told me was to keep sodium intake below 2500mg/day, as you retain water with solumedrol. It's tricky, because lots of processed food has loads of sodium.
My sxs were reduced all of 6 days before they returned after the infusion

I don't know why, but this always happens for me.
As for the lack of sleep, it is temporary...try to drink some relaxing tea before bed, and read something boring. if you awaken during the night, I would suggest not lying there waiting to fall back to sleep. Get up and read or do something boring like watch the weather channel. Always works for me
I hope that your sxs keep getting kicked down for a long time