Well around my 27th week i actually had the same concerns. I remember having light waves here and there and maybe like 2 hard kicks. Every 2-3 days he would just go nuts and kick and turn like crazy, then he would go back to his "lazy routine" and not move as much.
Your doctor is going to tell you that this is normal. If you are extremely concerned he may give you and ultrasound to make sure everythings o.k, and as long as the baby's heartbeat is strong there should be nothing to worry about.
You will be o.k
Mothers tend to worry alot during pregnancy about their little ones. You know we want everything to be just perfect!