Hi, and thanks for your medical question on eHealth forum!
If you have not been using pills and not using condoms regularly, then yes, you can be pregnant. If you do not use condoms during foreplay it is fine. But often the precum contains live sperms if the male has ejaculated in the last 24 hours. In such a scenario, if you are close to your ovulation date, you can become pregnant.
You can calculate the menstrual cycle length. Note the day you get period every month and you will know the average length of your cycle. Deduct 14 from this. This will give you the number of days after the start of periods when you could be ovulating. You need to be careful around these days. As of now wait for your periods to come or wait until the expected date of periods.
Take a pregnancy test if you miss your periods. Since a confirmed diagnosis cannot be given on net please discuss these possibilities with your gynecologist once. Hope this helps. Take care!