does heat make baby move less?

Katie • 20 yrs old ☀️ Leonardo 10.16.18 👶🏻💙

I haven’t had air conditioning in my house for the past week and since then I’ve also felt a decrease in movement. I’m 21 weeks and also have an anterior placenta but I’ve been feeling baby move since 16 weeks and felt his little kicks since 19 weeks. should I be concerned? I still feel him pushing on me but I really haven’t felt much since my anatomy scan last Wednesday. Everything looked fine then but I jus barely feel him move anymore