Congrats on 16 days toni, that's great! Yes, nightmares are very common during early sobriety. If you think about it, when we were drunk/drinking many nights we didn't even get REM sleep much because we were basically passed out. Now that your brain is clear of alchohol, it's "waking up" in a sense and stretching it's legs. They might seem scary, but they are just dreams...and they don't necessarily mean anything bad.