I understand your situation. I was on Carvedilol for 6 months and had the same thing happen. It is tricky to go off it. I worked closely with my cardiologist and it took me 6 weeks to wean off it. We also adjusted my other heart meds to compensate. It took another month for the symptoms to go away. I now feel great. But, you must be careful and make sure your health is not compromised by not taking it.
Good luck.