spotting before period

I have a question. So I never use to spot before my period started but the past couple months I have been spotting. It's not enough to drip on my underwear at all. I only notice a light faint pink when I wipe when I go to the bathroom before my period. Is this normal? I'm not sure if my body is just changing as I'm getting older or if I should be concerned. I don't notice anything else new. Also I am 20!