No, its not normal. And at your age that is nasty.

Don't worry things like this happen often...just contact your gyno and ask for a few recommendations....

Tri-Previfem is a triphasic birth control pill, which basically means that there are three different "phases" of pills in each pack, plus the last week of tablets with no active ingredients. Each week has a different amount of the progesterone hormone this is why it is important to take the pills in the correct order. You don't have periods when you take a pill instead you have what it known as a 'withdrawal bleed' which doesn't always happen. By the sounds of what you've described you began the first phase pack whilst you had begun your 'withdrawal bleed' which I think i'm right in assuming contained the amount of progesterone that would have stopped your 'bleed withdrawal' cycle. Not to worry, it just means that your bleed in 21 days time will be regulated. If you have any serious concerns then make sure to contact your doctor.

What's nasty? Taking birth control at 17? lmao. People my age take it for numerous reasons, and at least where I'm from, 80% of girls are on it for several reasons. It really isn't nasty for someone to be on it regardless...All comes down to what the medicine is and their purpose for taking it. Especially if it's to help regulate someone. I'd think at 12 years old you wouldn't understand it all too much, especially because being young, people think it's to have sex, when that's not always the case.

Thank you! I appreciate it :)