What could these symptoms mean: Nausea, thirst, an early and very long period, and very sensitive skin?

My girlfriend has these symptoms and is worried.
Her skin wouldn't be described as painful, but it is very sensitive and doesnt feel normal.
Also, her period has been early and is very long, and wasn't normal for the last few weeks of this abnormal episode. Only today it became a "normal" period.

Thanks!

Tagged as: girlfriend