Girls ????‍♀️Can you please tell me if it's possible to harm a baby in…

Girls ????‍♀️Can you please tell me if it's possible to harm a baby in the womb? How protected is he? I'm worried that I might not lie down properly and sleep soundly. He might be uncomfortable, for example, when my left leg presses against him, and I'm afraid that I might not feel this while sleeping... or from sudden movements, for example, my stomach isn't very big, and sometimes I get up suddenly. Is there any harm from all of this?