even without the discharge you could have an yeast infection or a numerous of std. not everyone is going to have discharge as a symptom. on the other hand if the pain is only during intercourse it could be due to dryness but highly unlikely with an odor. most importantly seek medical attention.
vaginal redness and irritation without discharge. intercourse burns like a yeast infection but there is no discharge. no smell of bacterial infection just irritation and redness?