I hit my side on the doorknob and im 7 weeks n a half pregnant.did it cause any damages to me or my baby?

U OK, baby likely ok: Congrats on the pregnancy! at 7 wks the uterus is still egg-shaped and maybe size of a large orange or small grapefruit and thus still swell protected/cushioned deep in your lower belly area. Simple bump into side which if not really hurting you much likely is not affecting baby. If you are having much pain, cramping/spotting/bleeding, then seek care asap. Otherwise, congrats! good luck.