Sunburn while pregnant

This is my first baby so obviously I’m new and don’t know a lot. I’m almost 30 weeks and the other day I was sitting in the sun for a few hours. I had sunscreen on but obviously it didn’t work like I thought. I useto never get bad burns in one day on the sun but I guess my skin just changed ..anyways I got a bad sunburn on my back legs and arms. My back hurting the worse and it’s all gross and wrinkly. Will this harm my baby? My stomach isn’t red at all I had a shirt on but I’m worried cause I didn’t know this would happen