I experienced a sudden jolt of pain through my bladder

Patient: I experienced a sudden jolt of pain through my bladder yesterday, i have had pain urinating for the whole of past year, currently it feels very inflammed and almost like a mild version of period cramps for days but it is sensations form my bladder i know this because when i touch the external opening of the urethra between the labia it is very tender and sensitive. All culture and std tests are negative i’m only 20F white F i feel like my life is gonna end. Please save my life. What other infections can i test for.

Symptoms: Pain in urination, cramps, jolts through bladder

Doctor: