Am I wrong?

So I'm 7 weeks pregnant with my rainbow baby.. had a mc in Dec. My bro just married in june. Him and his bride were saying they weren't going to have a new baby (they have a 3 year old) until at least feb. She's on the pill and apparently she is pregnant. It's not confirmed but my bro called expecting me to happy.. I'm not I'm pissed. I haven't had my first scan so I'm not sure this pregnancy is healthy and if it's not living in a home with a pregnant one who possibly has a healthy pregnancy will not be good for my mental health. Am I wrong for being upset about this.. I feel like they wanted a baby now because I'm having one... could be hormones but I need an unbiased opinion...