(females please help) white stuff in my underwear after ?

umm,.... i masturbate with a vibrator cause im not Comfy with stuff being in me so i use it so i can keep my underwear on while i do it. well today i had the most sensational powerful ever and when i went to the bathroom satisfied. then i found some white googie stuff in my underwear. i've never seen it before after i masturbated. it kinda looked like discharge but i don't know what it is. is this normal? im a virgin so it cant be sperm or anything since it can last like a week in your body. please help me and tell me what it is and why its there. thanks.