What should I do to protect my son? Am I over reacting?

This is an alt/throw away account for obvious reasons.My wife and I waited 16 years to have a child and I feel it's been worth every second of sleeplessness.Our son just reached the 18 month mark and he's been a little hellion for the last couple of days. He was a bit sick over the last couple of days, and has always been a fussy eater. Right now he'll barely tolerate anything other than sweet biscuits, bananas, and yoghurt.My wife has been obsessed with autism from about 3 months and it has been a constant theme ever since.A little bit about my son:He started walking at 10 months and has been full speed ever since. He may have a slight speech delay as he only says mummy, daddy, outside, and dummy. He was slow to shake his head and wave, and eye contact was a bit hit and miss until about 12 months.I think he's perfectly normal and just needs love and understanding to grow into the little human he's meant to be.My wife has been fairly unhappy/miserable with our new life. In her defence, we don't have family here as we live overseas. I run a small business so while I have a flexible schedule, I often work long or irregular hours. I'm certain the strains of 24/7 motherhood are starting to get her, but today was finally the last straw for me.She's so fixated on possible autism and how our life will be terrible with an autistic child. She went so far as to say she would have terminated had she known he was autistic. (She's convinced he is, I think he's a normal toddler). We raise this issue with our GP at every checkup/vaccination and their opinion is always the same: seems like a perfectly normal child.I'll refrain from repeating other stuff she's said in the heat of the moment because we all have an inner asshole that comes out when we're upset or angry.Right now we're at the beach and he's asleep in the backseat while I type this out. I'm trying to figure out what I should do? Am I over reacting? 18 months of this constant reinforcement that he's not enough makes me worried about how his relationship with his mother/upbringing over the next 18 years. via /r/Parenting http://ift.tt/2qFKpet