I feel bad for my girlfriend on her period anything I can do for her?

My girlfriend has been getting her period a while but its still not quite consistent and she says she's in a fair bit of pain and although she doesn't say this and I would never say this to her but she does go a little nuts I feel bad for her and I've asked her what I can do for her and she says she doesn't want anything but is there anything you girls would like or guys have you done something she liked, thanks heaps,
I feel bad for my girlfriend on her period anything I can do for her?
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