Stretch marks...oh no?

I haven't started showing yet... I'm just under 8 weeks pregnant, but want to take every precaution i can to try and prevent stretchmarks. I unfortunately am starting to see some underneath my ...since they are getting fuller now. I'm in pretty good shape (size 6) so I know some are inevitable, but I am trying to make it as minimal as possible! Along with my prenatal I take a vitamin E capsule, and also am planning on getting Palmer's Cocoa er lotion this week to start that. Does anyone have any suggestions of what worked for them?