Movement at 20w stopped?

Hi, have been feeling flutters and movement for a few weeks now (usually in the evening when I get to sit down for a bit) but all of a sudden I haven’t felt little one move since yesterday...I am a natural worrier as have had 3 losses and one rainbow baby but can’t remember if movement at this stage is up and down or if it should be regular? Have tried fizzy cold drinks and chocolate but haven’t felt anything-could bub have just moved position to where I can’t feel it? I am overweight so didn’t expect to feel movements this early anyway x