Sulfamethoxazole and wether

HI I HAVE BEEN ON THIS MEDICATION SULFAMETH/TRIMETHOPRIM FOR ABOUT 3 DAYS BEFOR TAKING THE MEDICATION I HAD A SERVERE PAIN IN MY RIGHT LOWER BACK I WENT TO THE ER AND THEY DIAGNOSED ME WITH A SERVERE KIDNEY INFECTION AND PERCRIBED ME TO THE 800MG OF SULFAMETH/TRIMETHOPRIM I STAYED AT THE HOSPITAL FOR ABOUT THREE HOURS SO I COULD GET AN IV AND THEN I WENT HOME AND TOOK MY FIRST PILL I WOKE UP AT 3:30 IN THE MORNING AND PUKED I WENT BACK TO BED WITH CHILLS AND A HEADACH I WOKE UP ABOUT 3HRS LATER AND PUKED ABOUT 15 TO 20 TIMES IN A 2HR PERIOD I WENT TO SLEEP AFTER TAKING ANOTHER PILL I WOKE UP WITH A TEMPATURE OF 102.6 SO I WENT BACK TO THE DOCTOR AND THEYSAYED THIS IS SOMETIMES NORMAL WITH PEOPLE MY SIZE (4'9" 104LB)SO I LET IT GO I AM ON MY 3RD DAY I FINALLY GOT TO EAT SOMETHING LAST NIGHT TOOK MY PILL WATCHED A MOVIE AND WENT TO BED WOKE UP THIS MORNING FEELING WEAK WITH JOINT PAINS MOSTLY IN MY LEGS BUT I THINK THATS BECAUSE I WAS IN A BED FOR THE PAST 2 DAYS I HAVENT PUKED TODAY KNOCK ON WOOD! I AM NOW AT MY BOYFRIENDS GRANDMAS FEELING A LITTLE BETTER I JUST HAVE A LITTLE BIT OF ABDOMINAL PAINS BUT THAT COULD BE BECAUSE I WAS PUKEING AND COUGHING I HAVE A DOCTORS APPOINTMENT FOR MONDAY AND HE WILL TELL ME WETHER I NEED TO GET OFF THE MEDICATION OR NOT IM ONLY 15.