First, it is not just a pill. It is one pill and the later that day a bunch of pills. A person who uses the morning after pill will most likely get violently sick, have very painful cramps, horribly headaches, dizzy spells, and it may last a few days. Some women can't take them for a variety of reasons. A few women have had permanent problems after using the morning after pill. If her parents don't know she is having sex - they will find out because they will want to take her to a doctor if she doesn't tell them why it is happening to her.
You have no right to try to pressure her to use the morning after pill if she doesn't want to. It is a medicine with very bad side effects. If she wants to take it - that is her choice to make.
The two of you acted stupidly and will have to be doing a lot of worrying for the next few weeks. What you did was extremely risky. When the condom broke you should have stopped immediately.
Men's bodies make sperm nonstop. Sperm is replaced in your body every single minute of every single day.
Precum has nearly as much sperm in it as ejaculate does - but it really doesn't matter - it take just one sperm to make her pregnant. A teaspoon of precum has hundreds of thousands of sperm in it versus multi-million in ejaculate.
So this is what you need to do.....
Figure out the day her last menstrual period started. If it was less than a week ago - you probably have nothing to worry about. If it was more than three weeks ago - you probably has little to worry about. If it was between one and two weeks ago- you have a lot to worry about. And if it was between two and three weeks ago - cross your fingers because that is the worst possible time.
She can take a pregnancy test in 10 days. If she takes it sooner it will may not be accurate.
If it is negative - keep your fingers crossed until she has her period. If she misses her period - take the test again. If it is positive - get to a doctor immediately so you can make a good decision for your future.
Good luck. I don't wish an unwanted pregnancy om anyone. The two of you need to start talking about what you are going to do different in the future ( pulling out accomplishes NOTHING!) - and what you are going to do if she is pregnant.
Let me know what happens - my fingers wil be crossed for you.
Susan