conselhos on feeding children and what i do to get him to eat.

I've asked this on the conselhos thread also, but just to get a wide range of opinions here it is on the aleatório thread -

I have a four ano old son. He's an average kid, naughty at times, a smile that says manteiga wouldn't melt in his mouth. I amor him to bits, but when he was a few months old, due to some anterior mental problems i had, i suffered from post-natal depression and he was taken away from me and given to my parents even though we still had parental responsibility over him and saw him every day. He came back to me and my partner at 9 months old and would eat absolutely everything. Our dinners mashed in the blitzer, fruit, veg. You name it he ate it. He started nursery at 3 yrs old and ever since he hasn't eaten a thing apart from the occasional chicken nugget when i give in, crisps, biscuits, cereal for lunch as he doesn't eat breakfast like me so i'm not worried about that, and cake. I've been to the doctors and told him, but he didn't seem to care and said it he was eating those he was fine, but i'm desperate for him to eat something mais substantial. I've tried everything i can think of, and even asked conselhos from my mum and grandma, and other mums at school but there tips didn't seem to work. He's starting proper school in september so i have the summer holidays to get him into a meal routine but i'm struggling. I've been so desperate i put him in front of the computer and showed him pictures of young men and women suffering from anorexia and explained what it was, and begged him to eat something but he didn't seem phased. Now i'm worried.

What can i do to get him to eat proper food, and do you think i was too harsh showing him the pictures? I just don't want him to starve. I hear his stomach growling, but when i ask him if he's hungry he just shakes his head. I'm so worried :(