If your pharmacy is closed, you can always call a pharmacy on the west coast just to ease your mind for tonight. (I did this a few times when I lived out east.) Then make sure to talk to your Dr. about it tomorrow.
It shouldn't. I was on antibiotics last cycle for a sinus infection, and my RE said the only thing he worried about was yeast infection from the antibiotics. So he suggested taking Monistat 1 as soon as possible so that I don't have a YI when it's time to ovulate. I did end up ovulating that cycle! So, the antibiotics didn't interfere with the clomid.
Re: Will antibiotics interfere with clomid??