Feeling less movement!

So the past few days I have noticed that I'm not being kicked anywhere near as much as I was before, it's not that there's no kicks I feel maybe between 10-20 a day but they seem a lot lighter than before, where I was feeling maybe 20-50 hard ones where you could see my belly being kicked from the outside. I feel like my belly has got smaller although my SO says I haven't and that everything is fine, I have listened with my doplar and her heartbeat is as strong as ever but I  just can't help but feel that something has changed and it's not that I'm worried it's just weird and I want to know if it's normal, I'm now 24 weeks and just want some information.