Hello, I'm hoping to find some understanding, how to better discuss this with my doctor.
Background: I'm 64, 20 years ago I was put on Coreg (generic Carvedilol 12.5 mg 2 x day) and Tevetin by my primary care doctor for high blood pressure. I was otherwise in good health, but battle weigh. About 4-5 years ago no longer able to get Tevetin, the doctor replaced it with Losartan Potassium (50 mg 1xday.) I did well. My heart rate was in the 60s maybe low 70s. Unfortunately this year my doctor passed away. --I scheduled a check up with a Cardiologist because I turned 64 and wanted a consult. We discussed exercise intolerance because I find it harder /slower to walk up hills. He said the Coreg might be 'putting the breaks' on my heart and switched me to Chlorthalidone 25 mg 1x day. I didn't taper off the Coreg, made the change the day after I picked up the prescription

My Problem: I don't feel right, I don't know if I have anxiety, or if I'm feeling the higher heart rate. It's a very uneasy feeling and gets worse from stress or if I dwell on it. I asked the cardiologist and the new family doctor, they both said Coreg was unusual for high blood pressure, the new combination is good. Instructed me to keep checking my BP and heart rate and as long as they are in normal ranges I was ok. (I had a stress test and there are no follow-ups) It's been 1 month, I was feeling a little better last week but its worse in the last 2 days.
What is this feeling? I don't know what triggers it. I'm wondering if I came off Coreg too abruptly and how long it will take to get use to being off it. Thank you for any insights.