Angel,
most of what i'm about to say has already been addressed, but i kinda skimmed over the thread so i'm gonna throw in my 2 cents anyway :-p
As everyone's already said, what you are feeling is completely normal. The odd sensations after the attunement are often associated with a 21 day cleansing period some people undergo. Personally, i've never been aware of such a cleansing after an attunement (rather, prolongued period of uncomfort) so i think the idea is that you shouldn't be worried unless you still get wierd flashes after 21 days.
As far as the tingling in your hands is concerned...well, that's kind of what the attunement accopmlishes :-p. that tingling is your new sensitivity to energy. as someone previously recommended, try running your hands over (about an inch away from) some living plants or rock crystals. also, you might try a simple 20 minute meditation just to see what happens. Just get in a comfortable position, play some relaxing, long music, turn out the lights, and just focus on taking deep full breaths for 20 minutes.
have fun with your new attunement, and don't be afraid to experiment
Dave