Dealing and living with past mistakes and regret

Anybody else have trouble living with regret, guilt etc..? I’ve made mistakes in my life, mostly small and only damaging myself but it can be so difficult to move past. I had a personal business issue 4-5 years ago that’s only just going through the courts now, it’s the only time I’ve ever been in legal trouble (and the most likely result is either very minor community service type sentence or a small restitution etc) but it’s brought up a whole heap of past trauma of mistakes I’ve made, going back to high school days, conversations I’ve had with people, past relationships, and just a whole broad of stupid stuff that no one remembers apart from me, and I’m finding it difficult to live a normal life, sleeping, working, socialising etc as it’s just eating away at me. I often think it’s karma but then I also remember I’ve never hurt anyone, so I’m just stuck in this self sabotaging phase of not being able to accept decisions I’ve made and move on. I dunno. Just thought it was worth the discussion. You never know.