Aww, gina, I know that feeling too well. Me and heels don't mix as it is, especially new heels. I am always the girl with bare feet at the end of the night. :(
If they pinch, you can buy a shoe stretching spray in most cobblers (is that what they call them?), that you spray inside and wear with socks for a little wheel. That actually works. If it's the balls of your feel like it usually is for me, then you can try the Party Feet pads. They're available almost everywhere.
Hope you can wear them almost pain free. :)