Hey Brother,
dun be discouraged or stressed out.. hope this verse encourages you..

Psalm 27:5-7 (NIV)

5 For in the day of trouble he will keep me safe in his dwelling;
he will hide me in the shelter of his tabernacle and set me high upon a rock.

6 Then my head will be exalted above the enemies who surround me;
at his tabernacle will I sacrifice with shouts of joy; I will sing and make music to the LORD.

7 Hear my voice when I call, O LORD; be merciful to me and answer me.

you are very courageous and honest to tell your boss the situation.. if i were you.. i might have continued to struggle and in the end produce lousy results..
Have faith in God that He will carry you through this :)

Share with you my situation.. hehe..
Just now before lunch, my senior told me again (note: again) that he did not see much effort put in my work.. but I tot i have placed more importance and effort in my work already. Guess i cannot meet his standard. I haven on the TV since i enter my hotel room, all because I dun wan to TV to distract me and affect my work. and i was on schedule for all the submissions.. But yet... he says I dun seem to be putting effort in my work. sigh.. I was a bit disappointed and spitefully said that he can say whatever he wants to say. i bet the evaluation is going to be very poor. But its okay la.. God knows the level of effort i have put in..