Sinus Medication Solution

I recently went to the doctors and got an antibiotic for a sinus infection and now I feel like I have a bladder infection? Will the antibiotic for the sinus infection help the bladder infection too?
Thank you,
Kassy

SOmeone who I know has a gall bladder infection and sinus infection. WHAT IS IT? ANd how do you know if you have it? Is it visible ? Anyways to cure it if you have one?