Yesterday

Yesterday I stayed  was in my bed almost all the day. I watched TV, played video games, and watched movies. But I felt guilty for being so lazy,. so I decided to studied study math, piano and chess for a while time.
Then I connected to social webs and I lost the rest of the day.
I sleept went to bed at 2 am, and woke up tonight  today at 11 pm.
I know it is I am suppossed that i should to enjoy my vacations, but I think I am overdoing it. exagerating it.

And Today I also discovered that my grammar is awful.

:)

Yesterday

Yesterday I was in my bed almost all the day. *You don't need 'my', you can just say 'in bed all day'

*in bed almost all day

*in bed for almost the whole day

I watched TV, played videogames, and watched movies.

But I felt guilty for being so lazy. So I decided to study math, piano and chess for a time. *Technically 'a time' makes sense, but I don't believe I've ever heard someone say this. It's more common to say 'for a while'. 

Then I connected to social webs and I lost the rest of the day. *In America, we say 'social websites' or just 'social sites' 

I sleept at 2 am, and wake up today at 11 pm.

I fell alseep at 2 am, and I woke up today at 11 pm.  *both falling asleep and waking are in the past - so past tense

I know it is supossed that i should enjoy my vacations, but I think i am exagerating it.

'I know I am supposed to enjoy my vacation' or 'I know that I should enjoy my vacation', but I think I am 'overdoing it'. - *exaggerating only works when you are representing something - for example, "I played video games for 100 hours this week." "That's not true - you must be exaggerating!" "OK, ok... I only played for 20 hours."

And today I discovered that my grammar is awful.

Also, today I discovered that my grammar is awful. - In English speaking schools, we are taught to never start a sentence with 'and' ... but many people do it anyways. 

Keep on studying man! You're doing great!