I feel like I could have made an identical post ~10 years ago. While I am about to share my experience, yours might be very different. I highly recommend talking to a doctor you can trust- and maybe a therapist to boot!
In my case, I feel that injuries were definitely related to REDS. In my mind, I had been really prioritizing my running! I was eating more healthy food (read: vegetables), running more miles, times were dropping! And then about 1-1.5 years in, I started to get injured. First was some tendon issues, then I started to feel perpetually tired, but couldn't sleep well. This made me only want to try harder to get back to racing well. But I just couldn't stay healthy. I had about 6-8 months of soft tissue injuries before I started having problems with stress fractures.
At the time, I wouldn't have said I had an ED, I would have just said that I was diligent about eating healthy. But I had totally neglected eating fat-- and probably was not eating enough carbs. I also felt like I had more control over my life when I was able to have a "ideal" diet. Anyways, when the bone injuries started, I hadn't had my period in about 3 years so my coach encouraged me to start taking the pill to get my period back. I saw a dietician who told me to take omega 3s to up my fat intake (they also said otherwise my diet was fine lol, even though deep down I knew that it wasn't). I remained in a perpetual state of injured-recovering for the next few years. In retrospect, I wish I had just given myself a year or two to recalibrate my body and work on eating appropriately and getting my hormones back in order.
Now, I run a lot-- even more than in college! And no longer have REDs-- it took a long time to get my period back. But now I am rarely injured. Tbh, in the first few months it will suck trying to get your hormones in order (and it is SOO hard to stop thinking about "eating healthy"), but it will be so worth it! Stay strong and good luck! You can do this!