From a single exposure the chance you caught herpes is low, especially if you had no symptoms. But a blood test can tell for sure. The test you need is the HerpeSelect test for herpes simplex virus type 2 (HSV-2), the usually cause of genital herpes. It is produced by Focus Technologies and many labs offer it. But some labs don't, so tell (don't just ask!) your doctor to do that particular test. If negative, it will be strong evidence against genital herpes. It should cost somewhere in the range of $30 (if you're lucky) to $60, but nowhere near $300.
I can't say much about the "flesh colored bump"--but agree that doesn't sound like herpes.
Good luck-- HHH, MD