Not sure what I am looking for here. Advice and thoughts maybe? Someone to talk sense into me to stop being bothered lol

Long story short my brother in law got engaged last year to his gf who I can’t stand. He is away at school while she is planning the whole wedding that’s in 10 months. (Made no sense to us to not wait to get engaged until he got home and they could plan together)

I am currently 30 weeks pregnant with our second baby. I just found out his fiancé is pregnant. I am shocked, bothered and upset. I believe it was done on purpose since we are currently pregnant. Aside from him being in another state at school, no home of their own, and a whole list of reasons it was a bad idea. I am bothered that we will now have children close in age. I am not close with her or get along well. We already have one child snd this is our second but I know that now every little detail snd thing will be compared. We are around them a lot as my in laws live 15 min away and we spend a lot of time over their with our first baby (only current grandchild) It even bothers me they will have the same first Christmas next year 😩.

So talk some sense into me to get this to stop bothering me!!!