My thoughts are with you all,have been through similar so know how you will struggle.
My lad was 14 and the apple of my eye,and when he took ill we did everything we could,but the end was around the corner and he took his favourite seat in the sun on my bedroom window ,gave a small cry so I took him in my arms ,gave him a kiss and love and he closed his eyes and left us.

He went in peace ,at home,with love,and I still miss him everyday.