Sun burn and heat rash possibly?

I’m doing a field hockey camp that’s on turf and in the sun, I’m one of those people like “Oh I don’t need sun block” so I didn’t put any on. And what do you know I got a major sun burn on my face, neck and arms. When I got home I put on bath and body works cream ( it was the only one I had). And today I loaded up on the sun screen. I still have my sun burn and I think I got heat rash too around my chin its bumpy and itchy and stings. I have banana boat aloe for the sun burn but what about the heat rash, can I use this too or something else? Thanks for your help I really need it.