the sentence is right???

weary 同 wear out 有不同的解釋....
weary: 疲倦的,疲勞的
wear out: 使精疲力竭
況且，wear out 的 past tense 是 wore out/worn out，不是 weared =.=''

應該說:
I feel wearied after a day's work. I can only gasp. What I want to do is to rest only, but I can't fall asleep sometimes.

I am worn after work. Gasping, I only want to rest, rest and rest... but often I cannot because I have trouble falling asleep somtimes.

I am really weared out after work...*gasping*
I only want to rest, rest and rest....but sometimes I cannot sleep.

wear out means 使精疲力竭, 被耗盡;磨損;耗盡...
仲有唔洗specify rest rest rest...其實一個已經夠!

For me, it got some little mistakes, here's my right way to write it out ^-^:
- I am really weared down after work...*gasping*... I only want to rest, rest and rest,
but I can not sleep sometimes.