the lower part of my left labia majora is extremely swollen. i just noticed it this morning. i felt an itching and went to the bathroom and at first thought a bug may have bitten me. it has been swollen for several hours now. there may be a very small bump inside the labia, smaller than a pea, to the left of the vagina. i can't tell if this bump is more sensitive because the whole area is so swollen. it is not painful, but slightly itchy. there is no discoloration and no differences visually, other than the swelling. also, i have not had sexual intercourse or engaged in any other sexual activity for a few days, so it doesn't seem to be related. any thoughts?