I completely understand what you are going through! I was in your shoes a year ago, as a postbac.
Have you considered applying to schools outside of TX? I was rejected from every school in the state that I lived in until I applied out of state and was ultimately wait listed. One week later, the school emailed me and now I am two semesters away from graduating.
I would suggest that you get your GRE scores up and apply to out of state schools. It has been my experience that programs like to have a nice mix of students from all over the country in their program. Also, see if you can add any volunteer experience to your curriculum vitae. The school that I completed my postbac work required us to have at least 10 hours of volunteer work, which included conducting hearing screenings at the local schools.
Also, think about schools that offer a new SLP graduate program that is accredited. Jacksonville University in Florida has a new, accredited program that I considered before being accepted to another school that has a newer program. Newer programs usually have limited, set requirements so your chances of getting admitted are pretty good.
Best of luck to you and don't give up!