My Husband Has Been Battling Something For Two Days Now.

My husband has been battling something for two days now. He has chills and fever which go away for awhile after I give him two Tylenol, but come back within a couple of hours. He is coughing up a lot of phlegm. The chills are the worst I've ever seen him have. He has been getting a good amount of fluids, and while he did throw up last night, he has had a little to eat today and kept it down. At what point sHould I take him in to be seen?