Check the stickies on the Women's Board.
15mg is WAY too high to start. DO not start there. You should start at 5mg a day, stay there for a couple weeks. Then decide whether you should increase.
10mg is usually the highest a female will take. Yes, 15mg may be safe for some - but MORE is NOT BETTER. If your diet and training is SOLID - 10mg is MORE than enough.
Var is NOT side-free. It has the very real possibility for androgenic sides. The more you take, the more of a chance these sides will occur. This is why you start low, and stay as low as you can while seeing results.
Most people take more AAS to make up for sloppy diet and/or training. Doesn't work that way.
What are you eating and how are you training? THIS will determine your results.