Change of movement 26 weeks

Kerenza

Hiya, as this is my first pregnancy I'm worrying alot, I had my 25 week midwife appointment last week and the last 3 days I feel like my baby's movement has changed. I have kicks here and there but not as strong as they were and not at the times she would usually be active. Today being the 4th day she's reacted to me lightly prodding my belly and gives me a few more kicks throughout the day but I still don't feel it is as much as she has been doing. Has anyone else experienced this at 26 weeks?! Is this normal? I have an anterior placenta. She was measuring exactly how she should and her heartbeat was 150 at my appointment last week.