That doesn't sound like an emergency. What exactly do you want us to tell you? Your risks are indeed low. It is good that you used a condom (personally, I prefer Durex or Kimono Microthins to Trojans). There is no need to pull out if you're using a condom.
Spermicide will decrease your risk of pregnancy, but will also irritate your body and increase any risk of STDs.
If your girlfriend does not want to use hormonal methods of birthcontrol but does want some back-up, she should consider getting fitted for a diaphragm or cervical cap. She should also consider charting her cycles, preferably under the instruction of qualified practitioners, or at the very least with a very good book. Then, with practice, both of you can tell when she's probably ovulating, you'll both know how you know that, and you can wait until three days *after* she's ovulated before having intercourse, and then only with condoms and any other forms of protection you choose to use. She cannot know ahead of time when she's going to ovulate. That simply isn't possible. She can make an educated guess, based on past experience, but you should ask what she's basing her guess on (length of past cycles? how many? can you see the records?)
The truth is, there is ALWAYS ALWAYS ALWAYS the possibility of pregnancy if you are engaging in intercourse. If you or your partner absolutely cannot deal with that possibility at this point in your lives, you should stick to other forms of sex for now.
[This message has been edited by Eclipse (edited 08-25-2001).]