is it a common thing for a baby to stop moving while in the womb .

if you're getting less than 10 kicks in 2 hours then you should call your doctor. With how far along you are baby could just have very limited space but thats why doctors say it's actually 2 hours.

2 days. I've only gotten here and there kicks at I'll be 40 weeks the 6 on my due date . and have a doctors appointment the 7

For how long? If you have less than 10 movements an hour (I think it's ten), you need to call your doctor.