Whether I have hair loss

I never paid much attention to my hair until I was a teenager. Then I realized I had less hair than most girls my age, but I didn't really care that much about it, I kinda just accepted that I had genetically thin hair. My dad is going bald, my mom has thin hair... and so does my sister. So I thought nothing about it, but lately, it has been bothering me, because I've started noticing just how much hair I shed in the shower or when I comb my hair. I don't know whether I have hair loss.