Self tanner stains?

I’m about to use self tanner and I have graduation photos coming up. I’m planning on wearing a white dress. My issue is that it’s getting hot in my areas and I KNOW I will sweat which has caused stains on other white clothing items in the past. Is there anything I can put on the dress or anything I can do to wash it out after? I want to wear this dress for graduation as well as my photos so I don’t want it all stained after one use.