I've Been Having This Discharge Since I Started My Period

I've Been Having This Discharge Since I Started My Period At The Age Of 12. It Look Like Mucus But It Was Milky .. I Later Had Sex With Muiltiple Partners With And Without Condom At Age Of 14- . I Finally Get Tested At Age 16 And Its Comes Back Chlamydia And Gonorrhea ... Is That Possible ? Did I Have These Std's For Years ? Pleas Help .... I Was Always To Scared To Tell Anyone . Now Im Having Real Bad Stomach Pains And My Tummy Grumbles For No reason , Also A Swishy Sound Occurs Like I Have Drunk A Gallon Of Water At Once ... I Need Advice