How do you see old threads that you posted/commented on? People left some really valuable information on my posts and now I can't access them.

How can I politely ask to be unblocked by someone on here? They blocked me and a therapist had responded to me, but since it was under the person who blocked me's post I can't see it.

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I have something that’s been on my mind but my post isn’t getting any interaction. Only offer advice if you’re willing to respond please!!! People have asked me in the comments to share something and I do and they never answer which makes my mental even worse