Ditto... lots of good thoughts here from the other posters.
A good book about age-sets is "Your 1 Year Old" or, "Your 2 Year Old"... it describes a child for each age, so the parent can understand THEM and know it's normal. You can get the books from www.amazon.com
Okay, he is ONLY 19 months old. Normal.
Sure you are big on rules and consequences... BUT, keep in mind his age-set. A 19 month old, much less a 24 month old... DOES NOT HAVE full "impulse control" yet. Full Impulse control is NOT fully 'developed' until after 3 years old.
So, a child this age will still make mistakes.
Sure, they can say sorry and it's cute and they realize when Mommy does not like something...BUT, BUT, they can't just obey, much less perfectly. When my son was younger, he would say or sign "sorry" to me....but at 13 months old (when he would do it) he was NOT always cognizant of what the heck he was saying "sorry" for... SOMETIMES, with a baby/young child, they are just doing what we tell them to do....BUT it does NOT mean they FULLY "comprehend" the ramifications of it. Like a much older child would. So keep that in mind.
Also "emotions" are NOT fully developed yet in a child as well. So 'abstract' concepts such as 'feelings' are not fully understood...at this age its all experimentation...and babies this age are 'reactors'... ie: cause and effect. This is how they naturally explore their world and their senses.
Sure, teach him 'boundaries'...but it will not be fully attained as yet. It takes time. Remember... it takes an ENTIRE child-hood, for a child to learn what WE want. Even Teens and college kids make mistakes and irk their parents, right? So... how can a 19 month old, not err?
Kids this age, bite, hit, pull hair, push, pinch. And Mommy is often the one that gets it, because we are closest to them. They grow out of it REGARDLESS IF YOU PUT THEM IN 'TIME-OUT' OR NOT. Time out at this age, is over the top... it won't be truly the best for them.
Just distract him, use soothing words and voices... teach him EMPATHY instead of "no" or "naughty" words/actions.
Teach him positive words/feelings.
Like Deanna Leigh said, I too began to teach my kids from a a young age, the 'names' of feelings, the facial expressions about it, and just letting them identify it. If they got upset, fine. I coaxed them out of it. I did not give absolute black/white options... I worked through it with them. Kids also need to know that we understand them.... I knew that in time, my kids would become articulate in emotions and communicating themselves. And, they are.
Main thing is to remember: if we expect a 19 month old or 2 year old or 3 year old to "act" like and behave like and understand like a 6 year old-- it will NOT work. And, the parent will be sorely disappointed and frustrated with their child. AND the child can certainly sense when the Parent is always frustrated or disappointed in them. And this alone can make a child act-out and tantrum, and get fussy. Because they expectations of the child is NOT age-appropriate.
A child will over and over and over and over make the same 'mistakes.' It can be repetitive. What kid is a "Stepford" kid? None I know of. So, we have to learn how to manage them. MANY TIMES... it is US, the Parents who can trigger the child too. It's not always the child, who makes problems or the stress.
No worries, your child is normal. It is a phase and it will pass. Then lots of other phases will erupt. Just guide, coax, teach, evaluate, and keep things age-appropriate.
As your son becomes older... he will become better at understanding what you are teaching him. I takes time... no child this age will 'behave' exactly as we teach them. It's all a process, over time, repetitiously.
Maybe too, 'stress' can be a factor. Kids of all ages can feel stress... maybe, since you are in the midst of a divorce... just use compassion with him, instead of expectations that he can't attain yet, because of his age. He is a boy... and boys MUST learn to have feelings, to express feelings, to 'feel' and to know it's okay.
Is your son talking yet? If not, this can also be a factor... he does not yet know the way to say things or the way to express himself. Ask him... show him... 'hear' him... guide him... don't just 'expect' things. Many times, our kids will show us a thing or two, and how to improve ourselves, too.
Good luck, just some thoughts,
Susan