Feeling down

I’m 20 weeks pregnant. And my body is really starting to change. I’ve developed a rather large stretch mark across one of my breasts and feel like the stretch marks on my thighs and butt from growing rapidly as a teen are getting bigger. My skin looks and feels like crap and I don’t feel pretty anymore. I knew the stretch marks and growing body would happen. I obviously don’t regret anything. But I’ve just been feeling sad. I don’t feel like myself and I really am scared I won’t look like myself soon. Anyone else deal with this?