UTI??

so since about 2 days ago i’ve been having this weird feeling in my vagina and pee hole and it has started to sting when and after i pee and i’ve had to go to the toilet more often. I spoke to my friend about it and she said that she would take me to the doctors or the clinic if it keeps on happening. I’m really scared because i’m 15 turning 16 in september and according to the <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> log it can be sexually transmitted so i wouldn’t feel comfortable talking to my mother about it because then i’d have to tell her i’ve lost my virginity. Today i went to school but i had to go home because i wouldn’t stop thinking about it and it made me feel sick having that stinging feeling down there. Please help me what i should do!! Is there any way i can go to the doctors (in the UK) without my parents finding out???