I'm sorry this happened.
There have been a few times where if someone turned up with a trailer, I'd ahve let them take every single horse off my hands. It's so hard when something bad happens!
My husband and I had planned for years before our first homebred foal was born. We learned, we showed, we thought it out long and hard. Then when our first foal was trying to be born, we lost both the baby AND the mare! A mare we loved, who was fun to drive, nice to show and that came from a friend who also loved her. Our vet was here with us from around 2am until it was light outside (and he got here w/n 45 minutes of me calling him out).
That was my all time low in horses. If i had a magic wand, I would have waved them all away to someone else. Plus, we had 2 other mares due to foal any day right here and one down at our friends also due to foal any day. It felt like I was strapped into a rollercoaster and had no way to get off the ride.
Just don't make any choices for a couple of days. Every time I have felt "THAT" bad about horses, it hasn't lasted long. A little time and, if it works for you as it has for me, you will soon be happy they're part of your life. And just do with them what you feel like. What YOU really want, not what you think you should be doing because so-and-so does. So many different things that you can do with the minis, and you don't have to do them all, or all at once. Don't put too much pressure on yourself because remembe -- this is supposed to be fun!
Good luck.