Stretch Marks and Chub

So I've had stretch marks since I was a pre teen, and I'm 21 now. I feel like my skin is just extremely sensitive. My dad doesn't really have stretch marks and neither does my mom or sister. So I'm not sure why I get them so easily, but is there anything that you guys recommend for sensitive skin and someone who already has stretch marks? Also, I am 2 days from being 16 weeks, any of you around this same mark and just feel chubby? I can't hardly suck in my gut anymore but it just looks questionable between "did she just eat a heavy meal or is there a baby in there?" 😂😂