Why did they do this!?

Mikey's P.O.V.
Even though my mouth is sewn shut and I can't speak I've managed to screw up. Maybe if I can't see? That'll make things better! I got the needle and thread again and was just about to start sewing when I heard a calm voice call to me. "Michelangelo." Oh boy, it's sensai. I'm now in trouble. I went outside to see my brothers all crying while sensai comforted them and read the notes. He looked up at me and he covered his mouth with tears in his eyes. "My son..." he managed to say. "Why?" He asked. I couldn't bare to see them, any of them like this and ran back to my room not bothering to lock my door. I again lifted the needle...
Leo's P.O.V.
I got up and went into the kitchen. I noticed the sewing equipment was gone. Mikey must still have it. "Guys, Mikey still has the sewing supplies. We need to stop him before he does something else." I spoke. They both nodded and we went towards Mikey's room. It was unlocked. We went inside and saw Mikey about to sew his eyes shut! "Mikey no!" Raph shouted. Mikey, not knowing we were there, dropped the needle in shock. Donnie grabbed the needle and sewing supplies and put them in the kitchen. We had to get the thread out of Mikey's mouth. "Mikey, we need to get rid of that thread from your mouth." I said. But he shook his head and bolted for the door, luckily Raph grabbed him. Mikey tried to escape his grip by struggling but Raph was stronger than him so he couldn't. "Hey, hey! Calm down Mikey. We're trying to help you!" Raph said trying to calm Mikey down but it didn't work. I sighed as Donnie came back with some scissors and some medical supplies. I helped helped Raph by holding Mikey down.
Mikey's P.O.V.
I tried to escape from my brothers but I couldn't. So I just gave up, I'll find another way. Donnie cut the thread and took it out. They then covered the holes in my mouth so that it wouldn't get infected. Once he had finished Leo and Raph let me go and I sat up. "Please...Mikey, never EVER do that again!" Leo begged. I sighed and nodded. I watched as my brothers left my room. I then got my nunchucks and took out the blade part. I cut my wrists, ankles, legs and arms, it was enough. I raised the knife to my neck and was about to slit it, when the one and only Donatello walked in. My eyes widened. "M-mikey!?" He gasped. But it was done, I had slit my neck. "NO!!" He screamed. Raph and Leo ran to us. "Mikey!?" Yelled Raph worriedly. I felt really lightheaded. I tried to get up but my brothers pushed me back down on the bed. "Lay down Mikey!" Ordered Leo. I gave a slight nod. "Donnie get the first aid kit!" He demanded. Donnie ran out of the room and a couple of seconds later, came back with a light green box. He gave the box to Leo and he opened it. Leo took out a cotton ball, a little bit of alcohol and a plaster. He poured a bit of alcohol on the cotton ball and dabbed it on the cut. It stung a lot so I tried to push him away. "Mikey I need to sort out that cut." He sighed, trying to continue, but I didn't let him. He sighed again and turned to Raph. "Can you hold him down please?" He asked. Raph nodded and walked towards me. I tried to get up but he managed to hold me down. After Leo finished dabbing the cut and then put a plaster on it, he looked up at me and asked: "Why?"