16 weeks and I can't feel baby moving

Lovejoy
This is my first pregnancy and I'm a little worried. I started feeling baby move (light tapping)about 6 days ago and I've been feeling it ever since. But today I didn't feel it at all. I'm trying to feel for it but I just can't. Over the weekend I lost 3 lbs and my sugars were extremely low. I'm not sure if that affected the baby a lot. I'm really worried and just need some clarification. If I felt baby move everyday for the last 5 days, is it normal to not feel baby at all the next day?