Need help ASAP

I'm 15 years old and possibly pregnant. Does anyone know home made pregnancy test ideas?!? PLEASE comment what I need to make the test and also comment instructions!!! 
I can't look up diy tests on my phone because my mom monitors my searches. Please someone help me
I want to test tonight and I can't go buy one right now
 Lately I've been eating a ton and for the past 3 years I have never eaten that much due to just not being hungry. My lower back has also been hurting. Not sure if I slept on it wrong or what but it's been getting little aches.