Super scared and paranoid

Evening, Ladies! I'm 18 years old and I had sex for the first time a few days ago. Before that we would mess around but never any insertion. However, precum did come into contact with my vagina , but not inside. Fast forward to the actual encounter and pre cum did enter my vagina. But we used a condom when we actually got into it. But I keep thinking, can pre cum get me pregnant? I still have about 2 more weeks until my actual period starts and I am super scared because I am much too young to have a baby right now.

Help?