I FEEL LIKE A ZOMBIE

I USE TO BE THIS VERY OUTGOING GIRL WHO SPOKE WHAT EVER WAS ON HER MIND BUT NOW I HAVE CHANGED. INTO A PERSON WHO KEEPS TO HERSELF AND I DON'T LIKE IT. I TRY TO CHANGE BUT ITS LIKE SOMETHING IS THERE HOLDING ME BACK. SOMETHING CAUGHT IN MY THROAT OR SOMETHING IN MY HEAD TELLING ME NOT TO SPEAK. I DON'T KNOW WHAT TO DO. I'M LOST AND CONFUSED IN THIS WORLD FOR MORE THAN JUST THAT REASON. I HAVEN'T REALLY BEEN FEELING MYSELF LATELY, LIKE SOMEBODY SUCKED ME OUT OF MY BODY. LIKE ITS JUST MY BODY WALKING AROUND LIKE A ZOMBIE. WHEN I LOOK IN A MIRROR I DON'T SEE ANYTHING IN MY EYES. ITS LIKE I'M LOOKING INTO BLACK HOLES THAT GO ON FOREVER. WHO EVER IS READING THIS CAN YOU PLEASE TRY TO HELP ME?