Do you reckon it's normal that my GF has gone slightly awol?

Now I know you don't know my GF like I do, but I was hoping you guys could give me some advice.

We haven't spoken lately and I'm wondering if it has anything to do with her failing this maths exam at Uni?

I got into contact with a mutual friend, and he told me she hasn't spoken to him or anyone else as a matter of fact for quite some time. He's the one who told me she didn't do so well in the exam.

Not only that, but she has this project to hand in today too.

I tried texting her yesterday, but she didn't answer and then I tried calling her in the evening, but she didn't pick up.

What do you guys think?
Do you reckon it's normal that my GF has gone slightly awol?
Post Opinion