I believe that just about any mother could have told you that! My daughter refused any kind of contact when she was in the womb. If I placed my hand on her, she would kick hard. I never got an ultrasound of her, all we could ever see was her foot! She's now almost 15 and she still stiffens if you hug her. Her brother loved being patted and caressed before birth. 9 years later he does not miss a chance to crawl in my lap for a hug. Their behavior has not changed since then!
You scared her -- she was probably wondering where the hand came from!