MD & DO What Are My Chances Of Getting Another Interview??

4.0 GPA; 31 MCAT (10 BS 11VR 10PS); Applying IS to all 8 Texas schools; Application transmitted 9/21.

I've gotten one interview so far from UT Southwestern about two weeks ago, but nothing since. Is it reasonable to assume that if I don't get an interview invite in a week or two, that the one is all I'm likely to get? Thanks!