Hi I just posted a query, baby was rolling over and playing on bed, while rolling on mattress only he turned over on mattress only and hit his back of head on mattress which was soft a little bit hard, after sometime he removed curdled milk,a very little bit as I just fed like half n hour before,he normally does remove curdled milk a little in a day I am not sure if this happened after he rolled over hard, please guide is this normal or do I wait and watch????he did not cry but playing since then.