What are some signs of autism in a 19 month old?

lack of eye contact. lack of certain language milestones. not wanting to be held. overly fussy.

I am a mom of 3 autistic boys. Some of the signs are: not wanting/showing affection, obsessing with certain items (toys) not communicating well, jumping/hopping in place, shaking arms and hands, hitting themselves (mainly in the head or face).
These are some of the things I have experienced with mine. I am NOT of medical profession....fyi ;)

lack of sppech or delay is in itself not a sign
but can be one of the signs
autism really is a lack of communication
and speech is only one way humans communicate
a child that age will pint to things-if your child does not point
a child picked up will hold on-if your child is not grabbing onto you-more like a sack of potatoes
staring at lights, or spinning fan or spinning wheels of toy and not making it roll like a toy truck
can have some self ingurging behavoirs, head banging, biting onesself
children at this age do not play with others but by the side of others, but if wants to play alone and does not seek out others-again early to play WITH other kids
lack of eye contact-but hard to judge as a mother (i think)
does not play the repeat game(you say bubble and child trys to say)
a lose of speech or skills-some loose, some never have

take cows milk out for five days (replace with almond milk) more speech?

early intervention is KEY
speak to your ped, if ignored, speak to another doc, keep asking until you get reffereal to county birth to three program
that is where we started, birth to three will NOT say autism, but if suspected they will refer to autism doctor and birth to three was EXCELLENT in explaining senosory processing disorder - can have SPD without autism, but pretty much all autism kids have SPD, and this helps you understand (or start to understand) how environment has effect of taking in info through the sense and when senses are not working how this shows in kids

mine is moderate autism and four now, email if you like
it took me 13 months to get ss disabilty for autism waiver - so IF your child has autism dx, have to be very active to get services
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what makes you think your 19 month old might have autism?????????

No, not overstressing. My 13 yo has autism and him not turning when I called his name was the first sign. Loss of speech at any time is a red flag, spinning in circles also, arm flapping - I would call early intervention in your area and get a free developmental evaluation. If there are no delays, then you have peace of mind. If there are concerns, they will offer free or very low cost therapy.

The first thing I noticed was lack of eye contact. She didn't point at things like toddlers do. She had learned about 5 words but lost them at about 18 months. She didn't respond to her name any more. She started having sleep difficulties.