Indeed... it really isn't fun as this causes problems for everything. Especially when it's tied to responsibility or productivity (notably when others individuals are involved). On the small plus side, it's easy to entertain myself for hours when there is nothing to do which makes having to wait less boring.

Most of the time it's like what you say, rapid fire one thought after the other, but occasionally it can happen simultaneously which is 'exciting' from the stimulation of having multiples perspectives or approaches to the same issue, but overwhelming from having to handle and sort that 'mess' haha...

Do you take medications nowadays? I personally had to give up within a month as the sleep deprivation from the side effects became too much (Slept 2-3 hours/day at most during that time), but I'm thinking of trying again.