Who has started to get stretch marks as early as 16 weeks?

I had the hardest time getting comfortable the other night while trying to sleep. My stomach was so incredibly itchy I couldn't lay still. The next day I happen to look down to take a look at my little growing belly, and I'm starting the beginnings of stretch marks on my sides! I'm ok with it, it just shocked me and I didn't realize how soon they would come! I've been applying coconut oil, vitamin e oil, and Palmers cocoa butter at different times of the day. I've also read they're genetic and can't be stopped, which my mom has stretch marks on her stomach from me. Anyone else noticing them soon? What are your thoughts about them?