Should I Get Tested?

I am a 16 year old girl who has never had sex and never did drugs but thinks possibly I could have hiv. About 5 years ago I went swimming in this dirty unfiltered pool and got sick almost immediatley. I eventually got taken to the hospital because I as dizzy, with a fever, and my throat was very swollen. They gave me to shots of steroids and one of antibiotics. I don't remember hen but I had to go back to the hospital where I took a blood test and tested negative for mono, so I still don't know to this day what made me sick. I learned some things about hiv that would make a lot of sense and I don't want to tell my mom because would think i'm being dramatic. Help!