See, what yates84 wrote. Sexual hormones have a high impact on the mental level. Anabolic substances causes an imbalance, which results in different ways: in the case of your girlfriend, she's is moody and may have irrational thoughts (from your viewpoint).
Regarding the period issue: yes, anabolic substances have an impact on the period cycle. The stabilization speed is very individual.
Regarding PCT for women: as long as the woman is in the pre-menopausal status, anabolic substances hit the HPTA, too. While man are using SERM/AI, a woman should NOT use these two drug classes. The main reason is the different hormone composition between men and women.
Work with Vitamines and Minerals:
- Vitamin B6
- Vitamin B5 (Pantothenic Acid)
- Zinc
- herbal extracts like saw palmetto extract, ginko biloba (leaf extract),...
As far as I read, your girlfriend is already off, since a short time. Due to the cumulation of the Ostarine, she has still four days after the last intake a "unnatural" dosage of Ostarine in the system. The fifth day would be an option, to start with the "PCT": clean food, and a lot of healthy stuff as mentioned above (don't exaggerate with the amount of vitamines/minerals/...). This will increase the recovery speed.