22w5d

I woke up Monday morning and didn't feel our son moving as much as normal but didn't panic because we had a check up that morning. His heart rate was great at 150 and he was wiggling around because she kept having to chase him to get a steady HR. Today is now Wednesday and he still isn't as active as he has been. I have felt him just not like he has been in the last two weeks. No cramping or bleeding, just tired as usual. Should I be concerned?