Sunburn? Should I see a doctor?

I went boating on Saturday and it was cloudy so I didn't wear any sunblock. (i know better now). But once I got home (around 8 or 9) i went upstairs to shower, etc, but when I began to change clothes the sunburn hurt so bad it brought tears to my eyes. I can hardly change out of my sports bra without wanting to scream with pain. once i was changed, i laid down(very carefully, my sunburn is sensative to touch) and i couldnt fall asleep for at least an hour and a half because of a deep pain in my stomach and head. I felt like I was constantly going to throw up and my head pounded. I've never had that feeling before because of a sunburn? Why did I feel such a pain for throwing up? (didnt actually throw up) What's the degree of this...should I see a doctor? What things can I do to sooth and repair my skin? thanks!