Baby Moving? Help!

I’m 16+2 today and I swear I felt the baby move last night but I can’t tell. It only happened when my husband was rubbing my stomach too, almost like the baby was reacting to it. He wasn’t messaging, just lightly rubbing. At first I thought it was a gas bubble, then it kinda felt like a muscle spasm but not painful.

I know everyone says they feel like flutters but I guess I just don’t know what that means. FTM here. Help me out!