Pre-cum?

My last period ended on December 23rd, and about a few days later me and my boyfriend messed around a little. He had not finished, however he may he did have some pre-cum . Although we did not have sex his penis did touch down there quite a bit. It is currently January 22nd and I'm concerned that my period is a few days late? I have symptoms including sore boobs, change in appetite, and white discharge. I'm not sure if I'm being paranoid or if I could possibly be pregnant. I'm too young to have a baby and I made a stupid mistake. Opinions please