Would be hard to share our personal experiences not knowing your medical profile.

What did your cardiologist diagnose you with? If he or she has you on labetalol must have diagnosed something causing your symptoms. I am not familiar with labetalol and have never taken it.

Are you syptoms just fatique and heart palpitations? How is your weight (fatique)? Are you under stress and anxiety (heart palpitations)? Do you have high blood pressure. Do you have electrical problems of heart?

Doctors must be seeing something if want you on Labetalol or surgery. You can see not knowing your medical history or even what your doctors have told you is your cause hard to give what we know from out personal experiences.

I can suggest without knowing your diagnosis if you don't agree with treatments and diagnosis try to get a second opinon from a major medical facility.
Good luck!