Maybe this other girl is insecure, and "needs" to do this kind of thing because it helps her feel better about herself. Some people are like that.

One thing you MIGHT want to try, is to be NICE to her anyway, before she has a chance to say anything mean or nasty to you---take the initiative and surprise her.

I did something like that when I was about 10 years old and staying with my Aunt and Uncle for a few weeks. They had a Shetland Pony named Apache, and there were some kids that lived about a block away, and whenever I rode Apache anywhere near them, these kids came running out towards me, throwing rocks, yelling, calling me names, etc. I was scared to go near them.

But one day I made myself do it, and when they came running out throwing rocks and calling me names, I stopped Apache, and asked them if they'd like to have a ride on him with me. I totally ignored their negative behavior. They stopped what they were doing, and all of a sudden became nice, and we became friends after that. The rest of my time there in that town was a LOT more pleasant, and I went and played with these kids almost every day after that.

If being nice doesn't sound like something that would work in this case, another thing you might want to do is try to turn her words into a joke of some kind.

When I was in school, and kids did stuff like that to me, I turned it into a joke against myself, and laughed, and it took the tension out of it. For example, when she made the comment about you being pregnant, maybe you could have stuck your stomach out and started waddling or something, and said "Yeah, and I think I'll name my child after you!", and then laugh and ask her what her name is, or something like that.

One kid in my school told me one time that she really liked me, because I always turned things into jokes and made people laugh, instead of taking things personally and trying to get back at the person in a negative manner. It sure takes the tension out of a lot of situations, and it lets the other kid know that her comments don't really bother you.

If neither of these ideas sound like they will work, I would suggest that you talk to a trusted teacher or counselor about it. Kids shouldn't be allowed to "bully" others, which is what she is doing, and if you aren't able to resolve it with her in a positive manner on your own, you should ask for some adult intervention.

I hope this helps in some way. If not, maybe someone else will have a better suggestion. Please take care, and don't let her get you down, no matter what!