I know exactly how you feel.
I feel sick, like I'm going to throw up.
Here’s a little something for you. This is just a small token of my appreciation. Go ahead, open it.
The energy you hold in your body is your feelings. It can take the form of all kinds of things. Good feelings, bad feelings, that "strange feeling."
Now, don't confuse this with the future vocab word 気持ちいい which means "good feeling." This one just means "feeling" because it doesn't have an adjective attached to it, telling you more about this feeling that you're having.
The readings are the same as the ones you learned with the kanji, though 気 is on'yomi and 持ち is kun'yomi. One of those weird exception readings, but it'll work out for you anyway, as long as you're studying the kanji well enough.