i noticed that bubs would be much more quite on some days. If i am very busy, sometimes i might not notice the slight movements. While other days, i would have to be comatised not to notice them
Did you lay down after your cold drink? Maybe even try something with suger. I do find that a really sweet milo does wonders as well.
But, certainly, get checked out by your obs. If you cant get into see them, i know my sister just went straight into ER at a local public hospital, and they checked her straight away.