My cousin is a jazz sax player, and takes tiny doses of Metoprolol to control
anxiety before performances, and it works
for him, but he sure sleeps well after taking the drug.
I'd ask your doctor if you could try HCTZ, quit taking beta blockers, buy a blood pressure monitor, and take your BP twice a day, and track it. He/she may have a strong reason to continue taking the medication, but why not ask the question?