<human>: Can you condense the text into three sentences or less?

Right, more story here.
I screwed up her christmas present, as the post office (I ordered it) was closed during christmas days.
I didn't get to pick it up today, as I fell asleep as a result of working on exam papers all night and it's not even sure that they still have the package at the post office.
IF they have the package, I can pick it up tomorrow at 10PM.
We originally planned to eat brunch together tomorrow.

She now wants me to come over, saying I could just work at her place. I earlier agreed to this, as I'm a moron, but had to decline, both because I have work, but also because I don't want to show up without her present. She's already sad and angry that I didn't get it the last time we were together.
I'm extremely stressed out and I have a billion things to do before the 3rd of January. We are supposed to be together at new years eve.

Right now, I really don't know what to do. I feel like I have to choose between her and the university, fearing that I will loose either one. The christmas present is just sort of a.. nice.. addition to my worries..
<bot>: Might not be able to get overly delayed present for girlfriend, she wants me over and I have a lot of university stuff to do.