If you leave a regret with interest, this means that if for some reason you don't recieve a bid from your final houses you have chosen, you are still eligible for a snap-bid from the one you regretted w/interest. You Rho Chi should let you know over the phone if you recieve a snap-bid, and ask you if you want to accept it. You did the right thing, but I'm sure you will recieve a bid from one of your other choices! Luck is on your side if you have a good GPA, and a good personality.