Nothing to worry about at all! When I have BH, my LO goes CRAZY. It makes it hard to tell what is contraction and what is her kicking me to death! Movement is great - no movement is bad.
And FYI, I had a biophysical and non-stress test today, and in the NST they monitor your baby and how they respond to any contractions you may be having. I had a bunch, and she was constantly kicking the monitors off from being so active. The doctors all thought it was a hoot! Not a single issue with her activity. So you're good. Don't stress!