whats wrong with me?

[XNathan]

I am always tired, have mood swings, wake up frequently in the night, sometimes have weak erections, and feels depressed sometimes

I am 19 years old, 6 foot, 194lbs, 17% bf and have been lifting for 2 years

I am not on any anabolic steroids either and do not take any medication

Whats wrong with me?

This is depression, can be caused hormonaly or by other physical disorder but IMHO its typical for depression.

Visit doc first than go to some mental health care professional.