Hi My Six Months Od Son Fell Down On Three

Hi my six months od son fell down on three occassions one fell down from sofa on tiles floor second time fell don with his babywalker two time he caried for awhile then got happy normal agean it all happened amonth ago but tody i was breastfeeding him and i felt a soft pump on his right side of his head went to the docters streat away docter told me is not so bad is only artivitual so what do you think