Suddenly started gettin acne all over my face which never happened before, after takin an e.c pill could it be the reason? will it disturb my periods?

Yes: The emergency contraceptive pill can do this. The acne should fade; get some topical benzoyl peroxide now. Your periods will eventually settle back. I also notice that you report having acne scars -- this cannot be from your present situation. You owe it to yourself to get with your personal physician to get your acne under long-term control.