Sunburn

Went to the beach this weekend to do some 20 week photos and my stomach burned :( Crazy because I'm light so I always have sunscreen which I reapplied twice while there and the rest of me didn't burn just my stomach. Apparently this is very common since it's hot, the sun is strong, and the the skin on my stomach is so stretched. But darn it hurts :( an apple cider bath is great but fairly temporary. Any good tips??