Hi, I was just browsing through and came across your post. I too have had your same symptoms. It doesn't happen to often but when it does it is pretty freaky. Have you figured anything out yet?? I am 34 yrs old/female, no children. Lots of computer work too. Hand numbness also.
after doing some research, i found something called AAA. have you ever heard of this? maybe it's worth checking into.