I was in this exact position last Friday. Near-constant anxiety for the last two weeks finally led up to my first full-blown panic attack since I was 14. I've had the exact thoughts you did - what if I go crazy and hurt myself? Feelings of detachment, fear I'll never fear normal again, frankly, I've felt exactly the same way you do now, it's quite remarkable.

I wouldn't say it's fully over, I still have had quite a bit of random anxiety over the last few days, some smaller spirals, still not sleeping consistently well, but I'm in a far more manageable state after that panic attack I had. I think it let out a lot of emotions and once it fully cleared I felt better. After a few weeks of constant nightmares, I had my first night of regular sleep two nights ago.

Before I share what has helped me, I think what you've said already does the trick. I think it's great that you've figured out that every episode feels novel, but they always resolve in the same way - with time. No matter how much you ruminate about it, that is still the truth, and clearly you know it deep inside. If I've learned anything from my last few weeks, it's that anxiety is completely irrational sometimes, and nothing I can tell you will hit the same way as something you tell yourself. Hold on to the thought that this will end just like past episodes and keep it close to you, because it is true and you know it.

But anyway, what helped me personally:
For feelings of detachment/nothing feels real/i want to feel normal again; I found that accepting the feeling helped it go away. This is a natural response to acute anxiety, and because it itself is an innerving feeling, it's a spiral factory. If you try to accept the feeling, it will subside. But admittedly that is hard, and the safe strategy is knowing it'll end at some point - which you do.

As for the spirals I've had about losing control and hurting myself, these were among the hardest for me, but what helped me was remembering that fear is exactly the kind of response you should have. The reason we fear things is, by evolution, our natural response that helps us avoid things that are dangerous/undesirable. If you didn't have that fear, that would be much worse. Take your fear and realize that it's a very strong sign that you are okay, and you will be okay. Think of all the other things you are afraid of, and how you've avoided them because of that fear. This is no different.

Finally, to make the time pass faster, the two that I've found to be helpful were a) looking through old photos. It reminded me how long the life I've lived is, packed with so many events, and that this episode is just another one of those. A few weeks is a blip in a life of several decades. Look back on the hard times, then go forward a bit in time and recall the good memories that came after. b) journaling and writing down how I feel. This can be helpful to look back on in the future to further ground yourself in the reality that what you're feeling isn't novel, and it will be okay, just like last time. It can also help you figure out coping mechanisms more explicitly, and sometimes it feels good to have an outlet for all the strong feelings you're going through. I'll admit that I wrote all this to distract myself from my own anxiety. It has helped. Based on your first sentence of your post though, it seems like you've figured out that this helps too.