I second what everyone else has said about not worrying. And they gave some great ideas.

The only thing I would add is that with my boys I used a lot of repetition.

If I was giving them an apple I would be prattling something like "Do you want an apple? Here's a nice apple. Apple...mmmm... apple." So I would use the key word multiple times. If we saw a car it would be "Look at that car. Car. It's a green car. The car's gone now." Yes, I sounded like a complete idiot! But when you think about it, if they need to hear the word x times to learn it, you're going to get to x more quickly that way. Plus they just love that you are talking to them!

Speech therapists and other specialists seem to do the same kind of thing I've noticed/read.