Sentence: It happens in our daily life, While i was studying M.S in X university

[Pavanhotscan]

Hi,

I am writing famous quotation below this line.

For everything you have missed,you have gained something else and for everything you gain,you lose something else.--------Ralph

Based on the above quotation , i am writing comments below this line.

"It happens in our daily life, While i was studying M.S in X university and was not selected in the campus, but learned so many other things in my life.I learned that we have to preplanned before you attend any exam. If you get a success ,the learning process will be stopped, so we loose this activity in our life, but we will improve our self -confidence" .

Does the above paragraph contain any grammatical mistakes?

Regards
Pavan

[Haihao]