Just miscarried

I just had a miscarriage over the past few days and I feel so broken. Me and my sister were exactly one month apart in our pregnancies, and i got the bad seed. I’m so happy for her and would never want to wish her bad but I just feel like it’s unfair. I was so sure and I wanted this and happy from the second I found out, and she’s been contemplating abortion since she found out. So why did it happen to me? Now my boyfriend wants to try in 2 more years which seems like it’s so long for me. I don’t want to wait anymore and I just feel so many mixed emotions about all of this.