Listen. To. Your. Body. If you are financially stable enough, take an immediate break, go on vacation, focus on your relationships, friends and other hobbies you have neglected in favour for your job.
If you are not financially enough, talk to your employer, explain yourself and negotiate a reasonable solution.
Once you have distanced yourself from your profession, try out other things as well, it might show you that you have a different calling, or you’ll re-discover the appreciation for your old profession.
> I know this is common in our field and I feel a bit stupid/guilty for it happening to me so soon in my career.
Lastly, do not feel ashamed and guilty, everyone has their limits, discovering them before it’s to late is actually a strength! Talk to a therapist, to get some emotional support and possibly learn ways to deal with future ones - once you had one, you are more prone to it.