Fear of the dark symptoms and conditions

I needed Metoprolol Tartrate for a very high heart rate for graves desease, I was in the 115's+ lowered too 8o beats per min. Which is great!
BUT, having some horrid side effects.
BAD night chills, intolerance to cold. Shake for 3+ hours then sweat. Feels like I was hit by a train after then I get very nauseasous and light headed
Sleep is bad, toss and turn all night and have a greater fear of the dark
ALSO, my bones hurt all the time!! Never did before, had tests done nothing there.
This is the only drug I could find that didn't make my heart flutter and feel all funky. Its a great drug for just that. All the side effects suck..bad

confusion, afraid to go to sleep, fear of the dark?

Severe leg pain, in calf and upper thigh. Unable to sleep, and then, into depression, as well as nightmares, and having physic delussions, as well as claustrophobia and fear of the dark.