It's normal if your active because sometimes your unaware of your babies movement. Whenever you have some down time drink something cold like a cold mountain dew lay down on your left side for an hour and see if you feel movement. if not lay down on your back babies tend not to like that position. If you haven't felt him in two hours then call your ob
Don't do caffeine. Just drink some orange juice. I had same feelings when I was around that far along. Some days are more active than others. Don't stress.
This is what midwife told me to do when I found myself her your shoes and it worked. Caffeine in moderation is not bad for you child ask your dr..