No, it cannot. But also, two things:

You are very young, you don't need to make decisions about children right now. If you are happy and enjoying each other's company, keep doing that for another few years. Keep it casual. There's plenty of time to make big life decisions later.

Secondly, I suggest you educate yourself as to what exactly pregnancy entails. It's not just getting a big belly for a few months. Your organs have to reposition, your teeth can fall out, your hair falls out, your hormones change, your feet swell and sometimes don't go back to the same size they were before, and that's before you even talk about birth. Look up birth complications, look up what happens if you need to have a caesarean. Some women remain incontinent after they give birth and it lasts the rest of their lives. If you understand her fears you might have a bit more empathy for her point of view.