A bit off topic, but growing up I couldn't talk to my mother about anything and that resulted in some pretty devastating/lonely sexual experiences. So the fact that you're open/able to speak to your daughter about these things is nice to see - and it will help if and when your daughter does need to open up. I think this will also help her make the best decisions for her, knowing that she has a supportive mother.

This is purely anecdotal, but for me, birth control at that age (I was a couple years older) was a life saver, and I didn't "feel" any side effects at that age, however, I'm finally taking a break from it now (first break in 14 years!) and while it obviously helped prevent pregnancy, the side effects over time really suck. Not sure if it was because I had taken it for so long without any breaks in between, but it really messed with my body. Now I'm trying to get my body back to its "normal" state. And! I made the mistake of not using condoms when I was younger so now it feels totally foreign and "not the same." So that's why I echo what others said about having your daughter getting used to condoms now - really, really recommend this. And use birth control as an almost-guarantee-back-up.

Also, when I was going through the process of getting birth control, I didn't have any women in my life (other than input from friends and they didn't know any better themselves) to help and it was a pretty lonely experience. Whatever your daughter decides to, just support her along the way and get some input from professionals.

BTW- I'm not a parent so can't give any advice beyond my personal anecdote.

As an aside: why aren't male contraceptives on the market yet??? (Rhetorical question because we all know why.. but still. I'm waiting for this blessed day)