Welcome Harry,
Although I’m sure your local doctors are quite capable, I would go to MD Anderson myself, if needed, which is the number one cancer center in the country, according to U.S. News Report, and they are member hospital with the NCCN, and NCI. High volume hospitals, and in cancer, also have better survival and prognosis rates.
A few days wait isn’t too long, and you can call MD Anderson to see if there are any sooner appointments.
Good luck