You can say this, that you certainly are sure that you are uncertain about important things in your life.

You are not alone, I'm having a Major Inadequacy Marathon and feel inept at work, like everyone thinks I'm as dumb as a lamppost. I feel like people are always judging me, when it is really me projecting my judgmentalness of myself.

I teach 6th grade now, and another teacher was in the room. We were reviewing History, and there was one concept that I couldn't remember. I KNEW I had known it once, but I then panicked because I started feeling like everyone knew I had clue as to what I was talking about, and my anxiety increased, and at that time I was truly unable to access any knowledge, making my idiocy even more idiotic. SOOOOOOOOOOO,
I then acted like nothing happened, and when I was alone, I allowed myself to feel my self hatred/anger at myself for being stupid, but intellectually I tried to self-soothe (OMG - I actually did this). I thought, I actually know most of what I'm talking about but I'm confused just about this one thing. This does not make me stupid. I thought of things some of my good friends didn't know and admitted to not knowing unabashedly, and I thought, now I have something to talk about with my friends. Sometimes smart people say stupid things; sometimes smart people don't remember general knowledge, and that is okay. It is not a death sentence, it is just one moment in time.

So when uncertainty strikes, accept that you are not certain, and say, I'm ambivalent about this because while I believe __________, I also wonder that _______ may be true.

Practicing mindfulness with people like Jon Kabat-Zinn is really helpful.

Fixated, I tried to take a class and work last year, and couldn't finish it, and lost money. It sounds like you are thinking of Shoulds, etc. My T was disappointed that I dropped the class. However, I made the decision to drop the class/lose money because I was mentally/physically exhausted and I needed to cut out some of the things that stressed me, and that class was one of them. I dropped it for that reason, and while I wish I could have retrieved the money back, I don't regret it. My therapist, husband nor anyone else knows what is brewing inside of me at times and I'm the only one who truly knows this. If they thought I was being lazy, not caring/trying, or whatever, that's their problem, not mine. I did that for me.

Just because your T has more schooling than you, doesn't mean she's smarter than you. She may have more knowledge about what she studied, she may have had more opportunity to go to school, and it may say that she was motivated. That's all it says. When I mean smart, I mean the ability to learn, not how much knowledge one has gained. You have your own strengths, and if YOU want to go to school, then find a way and do it. You need to find what you love to do and do it (as do I).

If others around you are doing classes, that has nothing to do with you. People have different stamina levels, and you have been through a lot of emotional stress, which will drain the life out of anyone. I also feel like I've lost brain matter or that I have Alzheimer's or something. You are not alone. Keep going forward, there's no other way.