HI , MY SON WHO IS 10 YEARS OLD WAS

HI , MY SON WHO IS 10 YEARS OLD WAS BITTEN A SPIDER ( WHICH WE THINK WAS A RECLUSE WIDOW} 2 WEEKS AGO , HE HAD ANTIBIOTICS AND A PATCH . THE PATCH DRAW THE INFECTION FROM HIS ARM , BUT HE THEN HAD ANOTHER SPOT WHICH LOOKS SIMILAR TO THE BITE APPEAR UNDERNEATH ORIGINAKL BITE , THIS NOW LOOKS INFECTED, YESTERDAY HE LOST NORMAL VISION AND HEARING , WENT PALE , WEAK , GREY , AND COLD / SWEATEY , HE HAS NOW STOMACH ACHE , HEADACHE , AND JOINT PAIN , THE DOCTOR HAS GIVEN HIM ANTIHISTIMINES BUT I AM STILL CONCERNED ?