From experience, I would say when you do chat next - don’t bring up her current worrying issue yourself in the conversation.
Let her chat, about other things, you do the same, and then when she does bring up the subject in her own time, then maybe just listen sympathetically?
I had the same with a friend 2 days ago, I knew she was troubled - but waited for her to bring up the subject privately when she was ready. It was appreciated, and better than me overtly asking her about xyz.
Similarly, I have been on the receiving end of people making me feel worse by ringing me solely to “address my problems”
Best to deal with it organically, let it grow, be supportive but when she brings the subject up?
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