I'm sorry it has been such a rough time for you. Trauma anniversaries are hard to explain. And why, even after years from the situation, we still feel we are right then and there.
It was a huge thing that happened to you. It changed your life as you knew it forever. I feel three years is a relatively short time and especially since you are still having surgeries and need care because of it.
I heard you loud and clear that you are grateful to be alive. And that gratitude will help you along the way. With the serious injuries, that was what had to be tended to first. Our brains can only process so much at the time of trauma. Your physical well being was a priority. As time goes on, you will be able to understand how the trauma affected you long term.
You are not doing anything wrong. It is just how our brains work. I know it's hard knowing you will go thru this for some time to come. But don't think it's because you aren't doing enough. Our brain will hand us things in bits and pieces because we can not process it all at once.
I'm grateful you are alive too. Be kind to yourself during these anniversary times. Hopefully, you still have a therapist because they help a lot when these things happen. And coming here helps. Sometimes we need to hear from someone else who has PTSD and anniversaries that we are doing very well. Maybe not what we would like. But we are making progress.
The sooner you accept that healing from trauma is a long process, the less hard on yourself you will be. We all hate it that it takes so long. But being here among people that understand helps.
Hope you get thru this time soon and hopefully some degree of healing will happen so it won't be so crazymaking next year.