WATS WRONG??

Tis few days i'm really not e old me that i use to be.. Especially when i'm alone duno y n for wat reason i cant smile, laugh, joke like the way i use to be.. Even till now i really duno y i turn out to be like tis.. It is still ok before my bday celebration but aft tt day it seems like something is wrong inside me.. Am i goin back to my old self when i was still in secondary?? Which i dun like?? I NEED TO GET BACK TO WAT I AM 4 YRS AGO!!! TTS E ME THAT I LIKE!! FASTER WAKE UP XIAOXIN!!