STD questions

i already made a post about talking with my boyfriend about possibly having clamydia but i have tons of questions and didn't expect this app to be as helpful as it is. so please help me out if you have answers.

im 17 and showing symptoms of clamydia (burns when pee, sores on tonsils, and a sore on vagina) but im a dependant on my mothers insurance. so i have the insurance to go get tested i believe, but my mom wholeheartedly believes im a lesbian (im bisexual) and has given me so many lectures growing up about having protected sex. im not sure how to have the conversation with her that i NEED to get tested, without her taking away my freedom. i also am a bundle of anxiety and am not sure what questions to ask when i call planned parenthood here soon. i feel terrible and ive definitely learned the hard way but i really would like to get this gone before it gets worse. i go to cali june 16-20th and with how urgent this is for me to take care of, i want to tell my mom before then but she will cancel my trip im sure of it. please, any advice, concerns/criticism, first hand experience, or even a lecture from one of y'all would help please. i have pictures of the sores as well

there are no free clinics in my city and the planned parenthood has no open appts until September. im fucked huh?