20 weeks is this normal?

Nomi

I’m currently 20 weeks. I’ve been able to feel my baby move since 13 weeks. But the past 2 weeks or so I haven’t felt him move hardly at all if any. I think I feel him move but it’s nothing even close to what it was before. It may be a little tiny flutter but nothing like a move I was feeling at 13+ weeks. Is this normal? I go back to the doctor on the 13th.