propanolol has turned my life upside down

i was given propanolol 20 mgs for high blood pressure in december and ive been taking it but ive developed all sorts of symptoms. cold body, numbness in hands and other, worsening of mental health, and severe insomnia from the blocked melatonin. i wake up about once an hour and its really difficult even if i get enough sleep i feel terrible. ive tried tapering down i think im close to 10 mgs but its still very hard. im asking to switch to atenolol as its supposedly isnt as much side effects. does anyone have any advice? thank you