Well, if you're worried about the wording, here's another suggestion, more what I would say:

"I feel vulnerable because I talked to you about a really difficult topic on _________. I am worried that I haven't heard back from you yet, if that is because I've said too much, but I am also wondering if something maybe came up or you didn't see my message? Please let me know, I'm feeling really uncomfortable after not hearing back for so long."