does rocking back and forth affect the baby?

I had recently found out I'm expecting my first. I have a bad habit of rocking back and forth.. like a mental patient you see in movies... (that's the only way I can describe it) and I was wondering if rocking affects the baby. I'm only 4 weeks, and I know obviously that I can't further in the pregnancy lol but I'm nervous it might cause a miscarriage or harm. Ive done it my whole life, all the time. whether I'm nervous , happy, bored, whatever.. and more lately since I found out I'm expecting. it's my form of comfort

edit: a rocking chair may be needed 😂