No, it is not normal. Situations and circumstances cause certain spirits to possess human beings temporarily. If you are careless the possession will increase and the spirit stays permanently. At this stage it is very difficult to remove it. Hatred is a spirit. People possessed by this spirit always hate even without a reason. The possession of this spirit gradually increases, makes to hate everyone and at last yourself.
Try to spend few minutes with the kids, often give them some candies and make them happy. You may also give some gifts whenever you feel. The negative force (spirit) will not allow you to do it but you must do it. Sooner or later it will quit, then you will not have that feeling.
Spirits are separate elements. A human being is not a single spirit. A human being during his/her life time is living with many spirits which have joined one by one since birth. They are knowledge, skills, feelings, emotions, interests and everything. Even thoughts are not your own. For example, when you want to take a decision on a subject, one after another the spirits think and you just listen, choose or reject the ideas which they transmit to your mind through your brain in the form of thoughts. Brain is just a media to connect the spirits to your mind. A mind is just a computer's mind. After the destruction of a computer completely you will not get it's mind. The same is the case with the human beings. Soul is nothing but an energy needed for the functionality of a body. It is not a spirit or anything else. All human beings are just robots made of flesh and bones and toys of the spirits for their games.