Getting a bit panicky. Help.

I have to leave in half an hour, to go to my band rehersal, and from there go straight to the gig to soundcheck, and then there will be a couple of hours where i have to face everyone and be nice - be my nice self. that side isn't surfacing. I've tried to get her going but it's just not happening. i'm unmotivated and i've got a headache, and i don't know the words well enough, and i won't have a chance to do my nails which are looking rubbish...

i have to leave in half an hour. i just can't get myself together. any words of encouragement you can offer to get me out of this slump? i can't get out of this chair. arghhhhhhh