This is post-Doomsday! Right after Rose is taken to Pete's World and before he says goodbye. Doctor is trying to move on after losing Rose.
Some Suicidal thoughts and self harm.
TRIGGER WARNING
Doctor POV I lay on the floor of the TARDIS staring blankly at the wall. I couldn't bring myself to move as wave after wave of pain rushed through me.
"Rose..." I whimpered. I looked at the console and my Sexy hummed, sad to lose her Bad Wolf. "I'm sorry...I wasn't good enough...I wasn't fast enough..."
I pushed myself up so I was leaning against the railing. I let a choked sob out and before I could stop it, tears were running down my face and I was powerless to stop them. I shook and cried silently until I had no more tears to cry. I got slowly to my feet and stumbled down the hallway, trying to find my Rose's bathroom where I knew there would be aspirin.
I walked for hours making slow progress as I leaned against the wall. I reached the point where I knew Rose's bathroom would be normally, but the door was gone.
"Please, Old Girl. I just want it to end." I begged. "I don't want to live without her. I can't." I stared at the wall, but the door resolutely refused to appear.
I turned and walked towards the medibank, trying to find something, anything that could end this. I entered the medibank, only to find it completely empty. The TARDIS interface flickered down as me and glared at me.
"You will live." she told me angrily.
I turned and banged my fist against a wall, suddenly filled with anger. "I don't want to! What's the point of living without her..." I trailed off as all of my anger drained away, replaced with hopelessness. "I'm broken, Old Girl. I can't...I can't go on without her." I turned and walked back to the console room and out of the TARDIS, emerging in Cardiff. I walked away from the Torchwood Hub, not ready to see anyone I knew.
I walked into a drug store and grabbed a large bottle of aspirin. I walked to the counter and flashed my psychic paper, walking out as the cashier struggled to close his mouth. I glanced at it with half-hearted curiosity.
John Smith.
Senior Executive Officer
United National Task Force
I put it back in my pocket and walked down the street. I sat down on a bench near the harbor and stared at the bottle in my hand. I opened it with shaking hands and shook a single tablet into my hand.
I lifted the tablet slowly to my mouth and opened my mouth. Right before, I dropped the pill and dropped my head into my hands. I closed the bottle and put it in my jacket pocket. I stood up and wandered aimlessly around Cardiff, everything blurring together.
I found another drug store and walked slowly inside. I stumbled down the isles until I found the shaving razors. I slowly pulled a pack off the shelf and started up to the front. I paid for the razors and walked with more purpose to the TARDIS.
I could feel her disapproval but there was nothing she could do. I tore the package open and pulled a blade out of the razor. I rolled my sleeve up and looked down at my arm. I slowly dragged the blade across my arm until blood flowed down my arm. I winced at the pain but dug the blade in deeper.
I pulled the blade out and drew it across my arm again, pushing it deeper, letting the blood drip onto my suit jacket. I stood up and walked towards my bedroom, the blood loss making me dizzy. I left a trail of blood from the console room to my room but I didn't care.
I dropped the knife beside my bed and pulled the bottle of aspirin out again. "I'm sorry." I pulled one out and swallowed it quickly. "Take me to Jack, old girl. He'll know what to do..." I fell backwards and welcomed the darkness of death.