Kicks weakening?

So since Monday, my baby boy's kicks have either been very weak or just non-existant. Before this, we almost had a pattern of kicks/times and they were all consistent. I've already called my Dr and she said to go in if I would like reassurance but I shouldn't be concerned. Everyone else seems to be getting stronger and more regular as their weeks go on, and I feel quite the opposite. I just want to know if this has happened to anyone else at 26 weeks?