Suggest Treatment For Swelling,itching And Discoloration On Foot

Okay so saturday more i went to the podiatrist and he put something on my Plantars warts and he said that my warts would blister and when i go back in 7 days he would peel of the wart with the blister. So yesterday Sunday night my warts were hurting bad and the doctor said that I could pop the blisters if I wanted. So i uwrapped the wrappings but the blister must have popped when i unwrapped it(because the wrappings were stuck to my foot. So I did not put the wrappings back on because I thought it wouldn't be hygenic so I just put a band aid over the large one. Today Monday I had school so I had to walk to all my classes. Now this evening my whole foot is swallon, itchy, and purplish. I do not have any known allergies. What should I do???