How to know if I'm "cancer-free"?

I know I shouldn't be doing this, but I have these sympthoms that when I google them, they all say it could be cancer. It shouldn't be nothing, but it kinds of scare me because cancer is very predominant in my mom's side. (Especially breast cancer). I know only 5% of the breast cancer cases occur to women around my age (+20), but I'm curious to know if I'm cancer free. How can I know this? I mean, is there any "test", or should I go directly oncologist? Thank you.
How to know if I'm "cancer-free"?
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