Kicking

So I’m 19 weeks and 5 days I’ll be 20 weeks on Tuesday and I have felt little things and felt the baby moving from one side to another sometimes not all the time but I am a very nervous person so I was just wondering if that is normal to only feel it sometimes not all the time. This is my first pregnancy and I do have an appointment for my gender scan on Wednesday so I’m gonna ask my doctor then but I just wanted to ask you guys what you thought.. we are having a gender reveal on Saturday!