Baby stopped moving

I’m 23 weeks and 3 days along for the past 2 weeks bubs movement has been rather regular and quite active but yesterday he went quiet, and today I still haven’t felt him. I think I might have felt some really soft flutter type movement over the night and this morning but I’m not really sure. I have read that movement isn’t predictable until the 28 week mark, I’m just wondering if anyone else has experienced this? Should I be worried? I’m really nervous and can’t get to the doctors right now..