Thy Duke

I had my sleeve surgery too about 13 days ago, yesterday i too noticed a golf ball size knot and lump (Very tender to touch) (Painfull when touched) just above my belly button, called my Dr.s office, there closing early today and is 65 miles away so no good going there, he said if i'm worried, go to nearest emerg. room. or see you Monday, today is wed before thanksgiving,,, wife says if it was bad, Dr. would have said GO TO EMERG. room, not if your worried?, what do you think?. Worried that somethings wrong?