I'm 21 weeks gone and same thing happened to me days ago. I didn't feel it move for 3 days and planned going to clinic on the 4th day. By morning of the 4th day, the baby was just doing acrobatics and moving in a way it has never moved before. Just like it was telling me, 'you want me to move, right? I will show you my acrobatic skills.'😂 You can go see your doctor if it persists.