If only trees could move, horse accident

So we were on our way down the drive way for a nice relaxing trail ride. Well our drive way is pretty long I live at the very back of 20 acres so our drive is about 15 acres long. At the drive we have a big red gate and on the inside heading out there's a button you push to open the gate. But having 5 horses and at the time only 3 riders the others follow wanting to come with us! So usually one rider has to get down and open the gate only a little and let the other riders pass and keep the other horses in. I'm not sure why, I guess she wasnt thinking but one of the riders just pressed the button. The gate opened and before I could react my youngest horse and donkey were running out of the gate and down the road, heading right for the main road. I immediately jumped down off my thoroughbred and switched with my friend, who was on my quarter horse and took off after them. I had been working with this horse teaching her how to pin up and she's smart she knew what I was asking and she did it, at a full run down this little dirt road trying to block him off and turn him around he dipped, real quick and went right taking a tight turn in front of a tree. Well my horse, doing her job followed right on his heals. But my friend had been riding her and I was in her saddel, and she's about 5 foot, and im 5'7 so her stirrups were very short and i lost the right one instantly that's when my shoulder and back met the tree. I take pride in this moment because I didn't come out of the saddle😊 but I did mess my shoulder up pretty bad, and I could feel it. But getting my horses home safe was my number one priority. Luckily the neighbor didn't close his gate! And my horse and donkey went right in, and I shut the gate. I did at this point fall to the ground in pain. My friends got grain and halters and got them home safe. As for me, my mom had to take me to the ER. At first I refused because I hate doctors and hospitals and I don't have insurance and I just knew it would be expensive. But when u can't breath apparently its a big deal so there I was. Turns out I dislocated my shoulder and had severe bruising on my ribs and back. I was right tho, 3,000 dollars in medical bills that I will be paying for the next 5 years. If horses weren't my whole life I wouldn't ride 😉 but they are and its all apart of life and I wouldn't trade my horses or this life for anything ❤