Hello, I have recently had protected sex for the first time and two days later noticed a lump around my vulva, just by the opening to vagina, around the size of a pea but it is hard and just a little, but too bad, tender to touch but can t tell if this is just from friction on it during sex if it was there the most recent time we had sex. Along with this I also have experienced thicker yellowish discharge which is abnormal for me. Please help I am 16 and just wondering what this is. Thank you!