Last semester senior year grades?? Please help.

<p>I really screwed up third quarter.
My 3rd quarter GPA wasabout 1.1 lower than my total cumulative.. and I got into all the uni's I applied to just this month! My first choice was the University of Washington in Seattle.. like i said, i'm in - but i'm scared ****less they'll withdraw my acceptance when I send them my 2nd semester grades! I can bring 'em up a bit, but I've definately screwed myself.</p>

<p>Anyone know if 2th semester senior grades are all that important once you're in? Will a slight drop (2.8 for the semester from a 3.1 cumulative) ruin everything?
please help!</p>