A hardly lesson -- Hardly means the same as barely, while hard means difficult

There are two options for the first sentence:

I had a mid-term exam today. -- This is used if you only had one exam.

I had mid-term exams today. -- This is used if you had more than one exam.

Before I (Use capital 'I' when referring to yourself) went on into the test, (there are no spaces between commas and the word) I thought I had no question problem (Having "no problem" means you find it easy, but having "no question" means the test didn't ask you anything, which doesn't make sense) with it, but when I was seeing saw (use past tense) the paper, I had no idea at it clue about what it was asking.
in that time, During the test, my brain forgot everything had nothing, that's which was so terrible. I just sit sat (use past tense when something has already happened) on my seat and sometimes write wrote (past tense) something not unimportant about it in the next one (this makes sense, but it isn't usually how people talk so it's not necessary when only talking about one hour; when talk about multiple hours, you would state the number, such as two, three, four etc.) hour. Time by time I just surplus wasted a half hour in the text-time, so.....that's too bad. ZZ))))):