Not a current student, but an applicant. I saw your post on the Republic of Texas page and can tell you are stressed. Let me try to put you at ease. Here’s my thoughts.
TMDSAS schools rank all applicants for Match day. They do this throughout the interview cycle and rankings may shift based on where later interviewees compare to the earlier interviewees. They could have ranked you higher than earlier applicant, but there will be no way to determine that. Your interview date will have less to do with admission than the rest of your application and the actual interview. If they took the time to interview, they saw something that stood out that qualified you as a potential student in their program. I believe only about 20% of all applicants to TTU Lubbock even get an interview so congrats on that!
Likely many of the pre match holders for TMDSAS schools will choose attend programs elsewhere, thus, opening many spots come match day. Wysdoc has a good post on pre match data that shows that most people do not receive a pre match.
Worrying about it anything right now will not change the outcome. At this point it is out of our control, all we can do in rank our schools and hope for the best. All of us are extremely stressed, especially those of us who do not have a guarantee in the form of a pre match. Luckily there is only about two more weeks to wait for results. Take a break for the next few weeks, go on vacation, hang out with friends, do anything to take your mind off of thinking and overthinking it!
*** AND MOST OF ALL BE SURE TO SUBMIT RANKINGS EVEN IF YOU ONLY HAVE A SINGLE SCHOOL TO RANK!!!!!!!!! ***
Best of luck to you this coming match day! I hope to hear great news from you!