Stretch marks at 20 weeks pregnant

Victoria

Overnight it seems as if I have new stretch marks in places I didn’t realize were “stretching” my bum was the first place they appeared. Now I noticed more marking on my underboob, front thighs, line across my belly. Why oh why so many? I apply bio oil and Palmers Stretch Mark lotion. What can I do to help reduce my stretch marks and help my skin stretch gently???