Baby movement

Samantha
I'm 25 weeks & 3 days &I still can not feel my baby move.  ðŸ˜ž my obgyn said I need to feel her by 26 weeks kicking 10 times if I don't within 3-4 hrs I need to go in . But I don't know when to start the time ? Has anyone had this problem before ? Please help me I'm a first time mom !