Hey there, Leslieslsa!
I agree with skilsaw, you do seem to have a lot to deal with, sorry to hear that.

It must be very hard for you having to cope with several disorders. There are other people on this board with diagnoses of BD and BPD, maybe you can reach out to them, if you'd like. I remember a couple of threads about it from a while ago.
Keeping in mind (as always) that nobody here is going to give you a professional opinion, I can give you my personal opinion as someone with BD. What you describe does sound like (hypo)mania (I have some trouble distinguishing between the two!).
For me, not sleeping and not eating are two of the most relevant signs that I'm not doing so good. I go for days with only a couple of hours of sleep per night, but still feel energetic and capable of accomplishing a lot. Even with the pills I take, which usually knock me out instantly... I also can't eat, I don't feel hunger. It's like I have to force food down my throat! I call it "gastric bypass syndrome", since that's what it feels like.
If it starts getting worse, I get agitated and anxious. Like you describe, I can't stop pacing, I can't stop twitching, I can't stop contracting every muscle in my body, I dig my fingernails into the skin... It's not nice.
The thoughts you describe seem to be racing thoughts. Like your brain is too fast for you to keep up, so you start to bounce from idea to idea and it's hard to concentrate on anything. That's why we forget what we were thinking / saying / writing.
I hope what I describe is helpful for you! Mania can feel very nice, but when it starts to spiral out of control... It's not! I personally hate the anxiety and agitation, it's the worst part. Do you have anything you can take in an emergency such as this? If not, maybe you could mention it to your p-doc tomorrow. Please don't forget your appointment, these things don't usually go away on their own, not before doing serious damage.
Stay safe and, if possible, give us an update on how your appointment goes and how you're doing.
Hugs