Hello deadpul. It's great that you are putting so much effort into researching a nice fragrance for your girlfriend. You don't say where you live though, so we wouldn't know what might be available in your area, and that can vary greatly, and no, you are right, you don't have much time!
Assuming that you can get most fragrances......my first instict on reading your post was Molecule 01. It's modern, still a bit unusual, and it smells great. I'm also thinking Elie Saab or Bottega Veneta for a young woman, or the beautifully presented Balenciaga Florabotanica would make a really knock out gift and it smells lovely too.