What's going on with my body?

My body has been acting so weird lately, but the pregnancy test came up negative.
(I've posted this in the parenting forum as well)
Okay, so these past two weeks...here's what I've noticed about myself
My fingers and toes swell up and go back down to normal 2-3 times a day. (yeah, odd huh?)
Between the hours of 6:00 pm and 11:00 pm I get sick to my stomache....but only once have I thrown up.
I'm much more emotionally ..um..out there..than normal. (well, that's what I like to call it.) My emotions are just much stronger....and I've cried more than I think I ever have.. lol ...it's not just crying either..it's bounciness and happiness, etc. Every emotion has just..upped a few notches.

I have the urge to pee much more often. More times than not, I get the strong urge to pee as if I have drank over 42 oz of water...and I pee such a small amount it's almost as if my bladder is on a strike. (haha)

Now..here's what's detering me from the thought I might be pregnant:
I did start my period (on Monday)... much lighter than normal, no cramps, and only lasted 48 hours. I spotted, however, a little here and there for 24 hours after. My periods are usually 4-5 days long and twice as heavy as this period was.

AND the final thing that's REALLY got me going:
I took a pregnancy test last night... I couldn't quite pee for FIVE seconds as it states...but that shouldn't matter.... because it read negative.

Now...question is....if I'm not pregnant..then what on friggin' EARTH is wrong with my body?! ARGH!!