Dano,don‘t talk about yourself like that.You will start to believe it and I am sure it is not true.
Some people are just not good at tests.I remember guys that turned into fine soldiers who had a tough time passing weapons test because they would freeze.
If you are strong great,we need that.Relax concentrate and don‘t worry as you write.
Head down charge hard,good luck.
I was a smart ****er but had to catch up muscle wise, so you can get through just as I did.