Well I took my 3rd pill last night, and things went better. I woke up briefly at 4am but I never sat up so I have no idea whether I was dizzy or not. I was a bit warm so I threw half my covers off, but nowhere near as bad as the night before. The only thing that seemed a bit strange was that the numbness was even worse than the night before and it had spread to almost my whole body... but instead of freaking out about it like I had the night before, I just ignored it and fell back asleep.
When I woke up this morning I felt fine - even better than I've felt for the past few days, so that seems like a good sign!