Are you a Texas resident or OOS?
If OOS, then cheer up, it's really hard to get into TX schools without being a resident, 3 interviews out of 4 apps is great. I am OOS, got 4 interviews out of 5 TX apps, which resulted into 4 waitlists, and I got into one last week. The cycle is not over yet, you still might get in.
If IS, I don't know exactly how the system works after match, but I'm assuming there will be lots of waitlist movement in April and May, especially for IS people.
As far as your description of yourself goes... Even though your MCAT is stellar, your GPA is pretty low, though if that's from when you were in your 20s I don't see why that would be a big deal. The biggest problem in your app (in my opinion) is how late it came in. If you have to reapply, do it very early. As in, if you're reapplying in Texas, submit as close to May 1st as possible. For AMCAS, within the first week of June.