My partner has no history of an std and neither have i we both have been together for 2 years now i wake up one day and my vagina has a white discharge swell up lips has small bumps on it and the lips are also dark and slightly itchy what could it be?

Genital herpes?: Herpes is possible with these symptoms, and genital herpes often appears more than 2 years into a monogamous relationship. Either of you could have been infected previously without symptoms. See a doctor ASAP -- accurate diagnosis and effective treatment both depend on getting started ats early as possilble. Good luck.

Itchy: Probably good idea to be checked. If itchy though a common reason for these symptoms would be a yeast infection. Although given partners history getting checked would be a good idea.