you can't hurt or squish your baby by how you lay, they're very well protected in there. I got in a car crash and baby's fine. baby's kick, doesn't mean they're happy, sad, mad, etc. its just what they do . lol you gotta be comfortable while you can. because soon you'll be so uncomfortable you just won't sleep ever.
its best to sleep on left side because it gives optimum nutrient transport and oxygen flow to the baby BUT as long as you aren't on your back it doesn't really matter which side you sleep on @kristen51