I got a yeast infection for the first time

So I got a yeast infection for the first time. I use tea tree oil and coconut oil for a couple days but then no longer had access to it anymore :-/. All I have is coconut oil. I haven't told my mom about it yet because I thought it went away (I'm 16) but not it's itchy n I have no more discharge! I'm not EXACTLY sure how I got it but I'm pretty sure it's from my birth control I've recently tarted taking since 4 months ago. I couldn't have gotten it from my boyfriend because we've be dating for over a year and I have been his only sexual partner. I'm afraid my mom wil judge me. Help! :-( I am in pain