Hi dear,
Pm should be cycled from day 5-6 to day 14-15 of cycle.
How many mg of PM are you taking right now?
The fact that you are having hormonal acne and more PMS is a sign in itself that the drug is working. But it can also point that you are taking too much if the symptoms are very overblown.
For you age, say you are between 100 to 120 pounds. The sweet spot is usually around 250 to 350 mg of PM.
If you feel that the brand of PM is not working good for you, it is better to switch brand than to increase dosage. PM varies vastly between brand because it is a herb, and many factors go into quality. (Crop selection/ land/ production ...)
You usually can tell after 1 month if the brand of PM is working for you.
Best signs that pm is working other than growth are:
increase vaginal lubrication,
Puffy nipples,
Perkier nipples,
Pms,
Better Cervical mucus
...
Hope this helps