About the concern of your hymen being broken. Most likely, it has been broken for quite sometime now.
Women are far more active today than in past generations.
The hymen can also be broken during activity, such as sports. You mentioned that you didn't know how far your boyfriend was inside of you. But given that you have had one period already following your sexual contact, you should have nothing to worry about. But be smart about it next time. An ounce of prevention is worth a pound of cure.