Guilt and shame are two of the most complex and difficult to grapple with human emotions. You definitely didn't do anything wrong, but some people's brains will

Guilt and shame are two of the most complex and difficult to grapple with human emotions. You definitely didn't do anything wrong, but some people's brains will latch onto guilt like a vice regardless. And it can happen regardless of the rational part of the brain knowing that you didn't do anything wrong. I have the same type of problem. The one thing that's finally helped a little bit is allowing myself to feel the guilt (and all the emotions surrounding it) fully. Normally I try to push it down (because I don't actually have anything to feel guilty for), but suppressed emotions continue to live forever, and they will surface in your body and mind in many ways. Allowing myself to feel it gives me room to process the emotion finally. Easier said than done, of course. You can't just turn the emotions on and off like a light switch, especially because the brain forms protective mechanisms to prevent you from feeling it. I've had some luck with IFS and somatic therapies.