At what point does an intense dislike/hatred become a phobia?

I have a few very intense dislikes--all rather silly if you ask other people--and it seems that the longer the go on the stronger they get. My one dislike is children. I just can't stand them and I go out of my way to avoid them. On occasion I have almost paranoid thoughts that they will literally come over and terrorize me for some reason in the store or on the street even though I have no clue who they are. I do realize these thoughts are paranoid and that they aren't going to do that but it still gives me pause. I also have a fear of pregnant women, especially very pregnant women. It's like they are full of bodily fluids and they will literally pop open if I am near them. I try to avoid pregnant women at all costs as well. And is it me, or do they seem to happen like an epidemic? It's like one person gets pregnant in the community then dozens are all pregnant at the same time. No, I do not like children, do not want children, and have never been pregnant.