Temperature of 99.6 rectally

D&D4Ever7

Yesterday DS has been really fussy all day yesterday.  He has temperature of 99.6. He did not nap all day, but slept ok at night.  He feels warmer than normal.  I am really worried since he is only 6 wks old.  His pediatrician office is closed over the weekend, but emergency line is open.  They don't want people to call with babies under 100.4 fever. What would you do?