As my baby is faced down, I mostly feel his back on my right side and sometimes some kicks on the left but the thing is he doesn't kick as much but wiggles more, should I be concerned, 30 weeks and 3 days according to the scan.Thank you in advance.

As long as you are feeling approx 10 "kicks" within a 4-6 hour period each day, preferably during the baby's active time, all should be well.