Since she respects your decision to have self-care and since she also took time to support herself, it would be helpful to ask her about her own thoughts by using most of what you said in the post.

We're internet strangers looking in on just a few details of your relationship. You're asking about what her thoughts and feelings are, not what we think hers are. It can be difficult to face emotionally, but asking her yourself is the option that would help the most right now if looking through a practical lens.

She likely will tell you what her actions already showed - she'll be supportive about you trying to patch any rough spots in the relationship and she'll still be open to supporting your break.

And if she does have any grievances to vent out to you, having this direct way to tell you can help her to feel comfortable.

Another important thing would be to tell her your own feelings about wanting to support her more and feeling off about how others had been mentally well enough to support her while you worked on yourself.

It's understandable to get second-opinions from the internet since it's an anonymous way to vent out. Though, some wording in the post seems like you're convinced you're a monster despite the first sentence denying it. Having a wealth of guilt is a common trait for anxiety, depression, and ADHD.

What's done is done. Don't take the judgment of internet strangers too personal when your relationship is all about you and your lover. If you're already looking for ways to ease her troubles, then you've already taken the first step. Good luck.