Just read your child's age, as my typing took a long time. How many words is your DS saying? That is a hard diagnosis at 19 months??
Just as an FYI, I am taking back my advice to you with my not knowing his age. If it turns out to be accurate, you may take or leave my advice.:) I will leave it in case anyone else with ELD does a search.
At 18 months, we knew that something was up with my DS because he knew his alphabet, numbers to 20+, colors, shapes,...by pointing, but wasn't saying a whole lot; so we had him evaluated. We were told not to worry; but he was still not willing to ask for things, although he was pointing and getting really aggravated. Just keep an eye on him; and good luck.:)