Had the flu for two weeks, then a head cold, sinus infection where my primary care gave me anti-biotic for the sinus infection. For 11 days after starting and finishing the anti biotic as well as getting a B vit shot and magnesium iv I have had gout like foot pain for 11 days now. Bruising is now showing up at different points on both feet. Painful and hard to walk. What s g going on? No temperature , otherwise I feel good now.