Hey, this is the message I ended up sending.

Mind giving me your opinion on it?

"Hey [her name], just wanted to let you know that a lack of communication on my part does not mean I don't want to talk to you anymore, to the contrary, I really care a lot about you and I miss you a lot. I just feel like I might be a bother to you, so I want to give you the space that you need by not contacting you any longer, at least for the duration between now and your response.

Please let me know how you're doing and/or if I can be of any help to you. If you don't want to talk to me anymore because I might have been annoying or stupid, then I completely understand, and like I've said before, I'm sorry for bothering you before, but at least let me know if you're still alive, I worry about you a lot.

I hope things are alright and that you'll feel better soon.

Sincerely, [my name]