Well, if you're not ready to practice sex safely and responsibly, then yes, it is a very good call to hold off until you can. I assure you that when you ARE ready to practice sex safely, with the tools you need to do so -- like condoms -- that it'll be a lot less worrying.
In the scenario described, you have little to no risk of pregnancy. Unless ejaculate or pre-ejaculate came in direct contact with your partners vulva, there is not a pregnancy risk.
You both do, however, have STD/STI risks, so be sure and get your yearly STI tests and screenings this year without fail. And be sure that if you chaange your mind and DO decide to stay sexually active, that you start doing so safely. For help with that, check out:
- Ready or Not? –The Readiness Checklist
- Safe, Sound & Sexy – A Safer Sex How-To
- Margaret Sanger’s Disneyland - An easy chart of your birth control options