Should I be concerned?

Nicole Marie • Life's a bitch & shit happens, but stay golden. XKP. XKP. XHP. 💚💚💚

Today I'm 20w pregnant with my 3rd baby boy, and I have yet to feel him move. My first 2 I felt at 18+w. I just need to know if I should be as concerned as I am or should I wait until I see my doctor on the 15th?