Clindamycin - Diarrhea & Constipation?

I start taking Clindamycin for a tooth abscess about 2 weeks ago and ended it a week ago. I took 150mg, 4 times a day and finished 22/28 of my pills because they made me sick. My infection is gone. Now I have a new worry my excretion. Since I started the antibodies I noticed I had strange gas and mild nausea and loss of appetite. As of yesterday I started feeling ill (just not 100% feeling, almost like I had the flu). My appetite has been minimal since I took the stuff and even still it is. I have been constantly eating yogurt and such... But when I go to the bathroom (please bear with me) my stools have either been diarrhea, "fluffy", or very thin. Definitley not my normal performance. They are usually small and not very much at a time. Last night I didn't feel like eating and was nauseated. But I made myself eat. Today I have eaten gently, yogurt, bananas, cottage cheese, and milk, chicken noodle soup. I have had several small movements and it hurts to wipe. Please help