Baby moving😁

I'm 18weeks 6 days, I feel my baby move quite a bit especially when I'm on my back but I only feel movement below my belly button closer to my pelvic area, and I was just wondering is that normal. I go to have an ultrasound on August second to find out what I'm having by then I'll be 22 weeks and will definitely ask the ultrasound tech because I dont see my obgyn until the next day which is the third of August but I was just curious if anyone was experiencing the same with movement below the belly button only.