Havnt really felt movement...

I went for a 20 am sono on Wednesday and thank G-d everything was great. Hb was 147 and he said that was perfect. I have other kids but I’ve had a few miscarriages as well and I’m so nervous that I Havnt been feeling movement consistently yet. Thinking back I’m sure my other pregnancies by the 20wk sono I was feeling movement quite often. Coupled with the fact that my lower right back above my butt is all achy I am getting paranoid. When are u supposed to feel movement throughout the day?