Sweetheart, you're too hard on yourself. But I see myself in your post.

There is a difference between being "stupid' and simply 'not knowing' something.

I went to college but don't know who the hell Sarah Locus is. Is that a UK person? I don't know anything about astrophysics or astronomy or football--but that doesn't mean I'm stupid, but simply that I don't know about those subjects. If I would like to know about something, then I guess I should educate myself, like you did googling on the internet.

Are you aware of cognitive distortions? Here are some bad words that signal that perhaps you have a cognitive distortion: should, always, never. I should know such and such because T said it matter-of-factly. You're implying in that comment that you are stupid because your therapist acted like everyone knows. That's just poor logic--not everyone knows this Sarah chick, and your T's matter-of-fact tone was just the tone he was using--it didn't imply anything.