Matthew has been through the same thing and it comes and goes. Especially when he is unwell and teething. It also happenes when I am home alone with him and if I needed to put him down to go to the bathroom or something he would cry hysterically. I have to explain what I am doing at all times to him, let him know I am leaving but coming back and I think that has helped.

I believe that they all go through it at some stage and it does pass. Then I will be wanting all my cuddles and he won't have a bar of me!