I Think I Might Be Passing A Kidney Stone? I've

I think I might be passing a kidney stone? I've passed one before and it feels very similar. Increasing pain on my right side, going to the underside of my shoulder blade, nausia, but I don't have the frequent urination. I guess my question is what to do? I called my dr. to let him know of the increased pain, so he ordered an ultrasound, but I can't get an appt till next week..... any suggestions? thank you, Margaret