I’m really struggling

We had our first miscarriage and first pregnancy 3.5 months ago and this are getting really hard. My brother and wife are pregnant and due just a week after we were supposed to be due. They have been really insensitive and I’m angry. We are having a family vacation in April and they will be there as well, I was hoping that maybe we would be pregnant again, but we won’t be. I cry even thinking about the trip and how hard it will be to see her 26 weeks pregnant when that’s how far along I would have been. We have been trying for 2 months going on three which isn’t long, but after the miscarriage feels like forever! We have been trying a total of almost 7 months and I’m feeling very discouraged and unworthy and unable. Truthfully I’m just really struggling right now.