29 weeks pregnant and was bleeding last night, but now it has stopped and baby is still moving a little,
Should I be worried?

Bleeding can be common during pregnancy. It will especially be common after intercourse, frequent walking and/or lifting.

How much were you bleeding? Was it spotting or bright red period like blood?

It would be wise of you to contact your doctor/midwife and let them know this happened. They may want to examine you or do a non-stress test on the baby.