Constipation

My little one is 7 weeks old and hasn’t had a poo in three days (since Monday night and it is now Thursday night) We have all been ill with a cold/flu recently and her bowel movements have reduced from one a day to one every two-three days this week and last since we got ill She is passing A LOT of smelly wind and eating absolutely fine Lots of wet nappies too We obviously plan on ringing the doctors tomorrow morning but she isn’t in any discomfort at the moment Has anyone experienced this or does anyone have any advice?