Recommend me the best ideas?

I am in a relationship with a girl , we love each other so much.. she is on exams right now and her mom took her mobile phone so she concentrates on studying.
Before that , i promised her i will be beside her every day during her exams because she is anxious , but now i can't reach her except sending her message through her sister that i am with her and making sure she is okay..
I am in real pain but i respect what she goes through and I know that i must not talk about missing her because she is having serious time right now.

I want to make her feel better after exams , what can i do for her?
Note : I don't work right now and i live alone , I suggest something special and affordable that i can buy for her.
This is our first year together and her birthday will be in September , but i think of something special for her after finishing her exams
Recommend me the best ideas?
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