HI. I Been 8.5 Weeks Post Mitral Valve Surgery. Yesterday

HI. I been 8.5 weeks post mitral valve surgery. Yesterday afternoon starter with a slight fever. Took some tylenol and went away but it came back late at night and when up to 102 and with shaking chills. Try to drink some warm tea but throw up. Had some more tylenol and that seem to help. I also had some sweating. 65 year old.
Please advice.