a none restricted NCBC App for young?

I start living with my partner recently, it is very hard to control ourselves as T and we are afraid to have sex because we are unsure of how to protect ourselves against pregnancy and condom alone is not 100%, I've read that the fabric can degraded and sperm may still slip through at microhole. so a 2nd layer of protection would make me feel safer and relax. I do not want to use any hormonal birth control as it effect my hormone like estogen and the side effect of it look very unpleasant so I'm seeking a non-hormonal birth control for female. I did try to use gemini and gpt to research but I don't know if it hallucinated the information or not as my situation is different from adult. most NCBC app are also restricted for minor so I really don't know where to look for. so are there anywhere I can do more research on this topic? because adult material is different from T. I wish to for a constructive answer please.