I had an issue similar to this: baby was very, very active and then for about 3 days was much less active.
Phoned labour ward at 10pm at night as had just drunk an , poked him etc and had no movement (all good ideas btw, my baby usually responds to all those things, and you can get him high on sugar if you have a big glass of OJ, which encourages movement). They told me to come in, and once there I got a bollocking for leaving it so long!
I had still been getting ten kicks per day, but that wasn't normal for MY BABY and that's what they said mattered. If it's weird for you, she said, give them a call. Midwife was extremely supportive and said she'd rather have me (and every other pregnant woman!) in there every day and it be nothing, than me waiting until I panicked and it be something.
If you're worried, give them a call, explain the situation and ask to go in for an assessment. They hooked me up to the machine for half an hour and it was great! They strap the bump, which really sets off the baby as they hate it, so we had half an hour of the strongest kicking ever, really helped set our minds at ease.
Like other women on here, I'm also saying that if you think it's weird for YOU, go in and get it checked. The worst that can happen is that they'll say you're worrying a bit too much, and put your mind at ease.