medicine to get periods???

hi there!!! i have a problem.. my last period was 10 june. after that i did not get periods... i took several hpts but all negtive. i visited my gynoshe tested again it was neg.. then she gave me tablets to getmy periods that is progestin tabs... so i am taking taht from last two days but i m having pain in my lower back and lower abdomen... anyone  can tell me whats happening????? any help plzzzzzzzz

[sim23]

breasts are really swollen..

[Grandmatobe]

Some of these might be side effects from the progestin tablets.  If the problem continues, you should contact your doctor for evaluation.

[sim23]

thanks a lot.