17 weeks and 4 days….still no flutters

I am starting to worry, I notice so many people feeling flutters and I feel like I’m not and it’s making me worried. I saw baby recently baby was ok but when I saw him I think he was just sleeping cause he wasn’t moving so much OB didn’t seem concerned. Sometimes I feel like I feel him but I have no idea. Also my stomach isn’t hard at all. HELP really need words of encouragement.