Frustrated

Ugh, my brain is rusted. I'm feeling old and insecure because I'm starting over but still the same thing I don't know a lot of things..i think it's dumb when you learned it already but still took you forever to figure it out..but the thing is at school (now) they think I'm smart becauase my score in the assessment was so high, but dang, all I'm good at is the what you call process of elimination...( & of coz, I took these subjects already 10 yrs ago)embarrassing!!!...right now I'm not so in love with myself.