Unfortunately melanoma can turn up anywhere but in females it is more likely on legs and arms.
Melanomas aren't often red but there is a rare form that can be. Rare things are called rare for a reason though so the odds are well in your favour.
All you can do now is wait and be kind to yourself while waiting for the results. Do be kind to yourself. It is reasonable to be anxious while you wait but please try and focus on positive things. Read a trashy magazine, have a glass of wine, whatever you do that makes you happy.
Let us know how your results turn out.
I, too, noticed a red spot on my chest last week. At first it was a freckle, but now has turned reddish. I am going to make an appt. with a dermatologist next week, but am scared to death, hoping it is not cancer. Anyone else have anything like this? Any info. will help. Thanks