Weakness, Sleeplessness, Seeing Strange Faces When I Close My Eyes.

I have just completed 7days of Biaxin XL 500 mg prescribed twice a day for Bronchitis query Pneumonia. My Doctor would like me to continue for another 3 days but I have become quite weak over the course, have experienced sleeplessness and today I had a loose gassy motion and have a queasy feeling in my stomach and have a strange sense as if my heart is palpatating. As soon as I turn off the lights to sleep and close my eyes, strange faces appear before my closed eyes of people I have never seen and a small light appears as if there is a a point of light in the room which is entering my vision through my closed lids. I have extremely vivid dreams. I don't think I should continue with the antibiotics especially after reading some of the other responses. I also developed stiffness and pain in the small of my back.