seventeen day late period 😰

i’m sixteen and a virgin. my period started about four years ago, and started to get regular about the second year into it. it started getting irregular about this time last year (when me and my boyfriend first got together) and has been irregular ever since. we’re both still virgins, but we do fool around and i give him head and he’s fingered me once. (but i’ve gotten my period after and that was a long time ago) and we have fooled around (like i gave him head) but he hasn’t touched me since before my last period. i’ve been having white discharge, and today i had clear stretchy discharge with white spots in it. (looked kinda like an uncooked egg.) and i’ve had a cold for the past 4-5 days. i feel kinda nauseous but i think it’s all in my head. im just super worried bc my parents freak out when they don’t see any pads in the trash can and they’ll automatically assume i’m pregnant. please help!