I've Been Taking 60 Cymbalta For More Than Seven Years.

I've been taking 60 cymbalta for more than seven years. Day and sometimes nights. However I also take medication for blood pressure, colesteral, vitamin b12, vitamin D, vit E and at nite 30 cymbalta at nite, neuron tin twice a day omeprazole,thyroid. I've been feeling tired all day. What am I doing wrong. Oh! I don't sleep all nite. I use to take Medes for diabetic