I was the same way, i actually didnt feel him move till i was almost 24weeks, guess i kept confusing him with gas haha or he was super lazy but just give it a few more weeks lol and im 34+5 days and hes slowing his movements again ...hes running out of space
Wait a couple of more weeks. I am now 26 weeks and feel her all the time. In the beginning thats how I feel my baby kicking too when I lay down on my side at 19 weeks.