Hi jimmilegs! Sorry for the delay in my response, but I lost track of the name of this site and only found it just now when I was (once again!) googling my symptoms and came across my own post!
A little update: I started on a higher dose of just about everything (I'm currently taking GNC's Women's Ultra Mega Active http://www.gnc.com/product/index.jsp?productId=4033452
) along with GNC's Potassium and Magnesium Aspartate 250 http://www.gnc.com/product/index.jsp?productId=2133455
) and additional calcium (usually in the form of milk). I added the Potassium because there have been several times over the past few months when I felt like I was about to pass out and thought that, even though my labs had come out "normal" my electrolytes might be out of whack because of the breastfeeding. I added the magnesium because I am also having a strange occurence at night, right as I am falling asleep, where my legs get a sort of strange tingle and then jerk, waking me up. Sometimes it's my arms that jerk (without the tingle). It doesn't happen every night (it seems to happen more when I'm stressed), but it did start at the same time as the twitching, so I thought it all must be related somehow.
Anyway, with this new regimen, the numbness had pretty much all gone away. The twitching (which occurs intermittently throughout my body--sometimes in a hand, sometimes in a foot, sometimes in a leg) is not severe (often it's just a single slight "jump"--almost like a heartbeat, sometimes it's several slight jumps, sometimes, but rarely, it's enough to move my thumb and index finger several times). It occurs always at rest, mostly at night and especially as I'm lying down to go to sleep. It also seems like it might get better/worse depending on stress and hormonal change.
Unfortunately (or maybe, diagnosis-wise--fortunately), I just had a three day bout of the stomach flu and couldn't take any vitamins and a slight numbness has returned in several fingers of my left hand and in my left leg. This leads me to believe that, probably, at least the numbness is related to some sort of deficiency. Also since I've been taking the potassium, I haven't felt like I was going to pass out, so I'd say that's probably due to an imbalance, too.
To answer your questions (sorry to be so long-winded, but, from reading some of your other posts, I know that you're a WEALTH of information, so I really want to give you a full picture of what's been going on):
Yes, I had been supplementing when I got my labs done. The doctor told me not to bother fasting, so the testing was done within about 4 hours of taking a whole lot of supplements (and I had been taking them for about a week prior to testing). By the time I saw the doctor some of the symptoms had started to subside (they always ebbed and flowed, they were never constant), but they didn't really start to get signifigantly better until I upped the dosage to my current regimen).
They tested for electrolytes, b-12, iron, calcium, sugar, and, I believe, magnesium. I don't know my exact numbers-- the doctor just told me they were "normal," but to keep supplementing since the symptoms were getting better.
If you got through this whole thing, I would love to hear your thoughts. Even though I think there's reason to believe this is deficiency-related (I have, after all, been breastfeeding and/or pregnant pretty much constantly for a little over nine years now!) the whole thing is still kind of freaking me out...
And yes, I've now stored this site in my "Favorites" bar.