you will need to see a medical provider. there is really no way to blindly determine the true nature or significance of these "bumps" based on a vague description.
i just started noticing these two small knots next to my crouch and they hurt a lot when i touch it. im 15 and ive had a gf for about a year and we had sex for the first time like last month and i'm wondering if this is some kind of std or something im kinda freaked out about this whole thing. i also play sports so im not fat or anything and i hardly ever get sick.