What do you do when you feel sluggish?

Yes

Well... When she watched her favorite person then she would say she felt love with him

If it is a diesel it is the lift pump, replace it before it takes out the injection pump. If it is a gasser replace it with a diesel. check the cat converter

You feel a dysphoric feeling - meaning "not so well feeling". Your body seeks warmth, so as to avoid unpleasant skin sensations, joint stiffness, runny nose, and concentration which is sometimes not...

I feel bad is correct. In this case, "bad" is what is known as a "predicate adjective". Predicate adjectives follow certain types of verbs such as: seem, appear, look (he looks bad), sound, feel...