As in your question you have little tiny bump with itching in vagina.
but itching is not usually associated with hormones. so it is not becouse of hormones.
I think it may be associated with fungal infection
Vaginal wall has planty of secretory glands . so bump may be due swelling of glands.
but for all it needs vaginal examination
so i will advise you to consult to a gynaecologist for examination and evaluation
ok take care