Hello. I ve been living communally with raft guides. I got a cough and a sinus thing and wasn t getting better due to being on and in the cold water. I took a z pack, and since I ve been done with it, I have not been on the water. I finished the z pack 4 days ago, and was feeling better, but now I feel feverish, I have a headache, and my cough is coming back.