It's normal for the area to swell a bit after the tick has been removed. It probably itched, too. You can dip a qtip in some rubbing alcohol and apply it to the center of the area to help with the itch and cleanliness. If you don't see a black dot in the center of the affected area, then you probably got the head of the tick out. Not sure why she would have low energy, although it's not likely related to the tick.