Clindamycin Phosphate and sinus infection

I'm a 41 yo woman. I was prescribed 300mg to take 3X per day for 10 days for a bad sinus infection. After the 2nd pill, I experienced a very intense nausea like never before. My mouth tasted like a metal pipe. When I went outside, everything appeared bright/white and I thought I saw white flashes in the sky. Also, my kidneys felt like they would explode. I had also started prednisone that same day. Would you think it was a bad combination or did I have a bad reaction to the Clindamycin? I stopped using it and went on Avelox. After 6 days of that stopped it because I could hardly get off of the bed, my leg became numb and I felt like I had a football helmet on. Was that also because I was on afew days of prednisone?