IM SO WORRIED ABOUT MY 2 YEAR OLD

MY SON IS 2 YRS OLD HIS BIRTHDAY IS 11/7/05 SO HE IS A YOUNG TWO.HE IS GOING TO DRIVE ME CRAZY AND I DONT KNOW WHAT TO DO.I COULD JUST BREAK DOWN AND CRY CAUSE I TRY TO BE THE BEST MOM AND I FEEL LIKE I HAVE DONE SOMETHING WRONG.ITS REALLY SAD THAT ON SATURDAY MORNING YOU ARE PRAYING FOR THE DAYCARE TO OPEN ON MONDAY JUST SO YOU CAN GO TO WORK CAUSE HE IS SO OUT OF CONTROLE.DONT GET ME WRONG I LOVE HIM WITH ALL MY HEART BUT ITS LIKE HE IS TO CHILDREN IN ONE.ONE MIN HE IS GREAT VERY LOVEING ,HAPPY,PLAYFULL.THE NEXT CRYING HURTING HIMSELF OR ME OR JUST DESTRUCTING THINGS ALL TOGETHER.THE SCHOOL SAYS HE IS GREAT THAT THEY HAVE NO PROBLEM WITH HIM BUT WHEN I GET HIM IT A DIFFERNT STORY.NO MATTER WHAT I DO IT DOESNT WORK.I HAVE DONE TIME OUT ,SPANKING ,YELLING, BEING CALM,TALKING TO HIM ,AND NOT EVEN PAYING ANY MIND TO HIM BUT IT JUST SEEMS LIKE HE DOESNT CARE.OH AND ITS NOT ONLY ME MY MOTHER AND GRANDMOTHER AND HUSBAND HAVE THE SAME PROBLEM TO.WE DONT KNOW WHAT TO DO.HE NEVER STOPS GOING AND HE DOESNT EAT GOOD HE TELLS US TO SHUT UP AND HE WONT STOP SAYING IT HE SPITS ON US AND BITS US THE DOG AND HIMSELF.HE LOVES TO HURT MY9 YEAR OLD SISTER ,8 YEAR OLD BROTHER AND OUR DOG HE THINKS ITS FUNNY.HE LOVES TO BREAK THINGS AND DOES  WHATEVER YOU ASK HIM NOT TO DO.HIS NEW THING IS GETTING UP A 4 AM AND IF WE DONT GO IN FAST HE POOPS AND PUTS IT ALL OVER THE PLACE.ON TOP OF THAT HE WONT GO BACK TO SLEEP.WE TRIED TO CHANGE HIS BED TIME BUT THAT DIDNT WORK.HE GOES DOWN AT 7:30 EVERY NIGHT AND WE READ TO HIM TILL ABOUT 7:45 OR SO AND BY 8PM HE IS ASLEEP.THATS THE BEST TIME CAUSE IM BLESSED HE DOESNT GIVE ME A HARD TIME WITH THAT.HE IS ALMOST POTTY TRAINED SO THATS NOT REALLY A PROBLEM ITS JUST THE OTHER STUFF .THE LIST OF BAD IS LONGER BUT I CANT THINK OF IT ALL.WE DONT KNOW WHAT TO DO . ANY IDEAS?????WE HAVE A NORMAL FAMILY AND IM  HAPPILY MARRIED HE IS OUR ONLY CHILD AND I WAS A STAY AT HOME MOM WITH HIM FOR TO YEARS.WE THOUGHT MAYBE THE CHANGE OF HIM GOING TO SCHOOL AND ME WORKING WAS THE PROBLEM BUT THATS NOT IT CAUSE HE STARTED ALL THIS  AT ABOUT 15MO.I DONT KNOW IF I SHOULD TAKE HIM TO THE DOCTORS  ABOUT ALL THIS CAUSE I DONT WANT HIM TO BE LABLED WRONG OR ON MEDS AT SUCH A YOUNG AGE. I READ ALL THE TIME BUT IF YOU HAVE ANY IDEAS I WOULD LOVE TO HEAR THEM.THANK YOU FOR READING THIS.