Hey Draconiquist -- your mom is right, this is totally a space where you can talk about things like this as freely as you like. Up top I just want to assure you that our staff and volunteers would not find this awkward and I can confidently speak for everyone when I say that we aren't making assumptions or judgements about you or your sexuality. We're happy to help!
The short answer is yes, it is very normal to feel this way around this time in your life. I don't think you "need help" to
fix anything you've talked about here, but perhaps some reassurance and tools to understand yourself instead. I want to ever so gently push back on what your mom said about porn. She's right in that it's fake - meaning, it's a fictional situation meant for entertainment purposes, much like a movie we'd watch in the theater. And yes, unfortunately sometimes sexual media is made with underaged performers and/or performers that get into non-consensual sexual situations. Seeing that kind of stuff without any context can be confusing and make us have unrealistic expectations for sex that can hurt our self-esteems. However! The desire to want to read or watch sexual media like porn or fan fiction is not unhealthy at all.
Here are some articles on our site that I think might help you figure some of this out:
Making Sense of Sexual Media
Reality Checking Mainstream Porn
Undoing Sexual Shame
How to Understand, Identify and Make Choices About Desire
Also, when you talk about feeling guilty -- why do you think that is? Have people in your life told you that masturbating or feeling sexual feelings is bad? It sounds like you and your mom might talk about it, has she ever discouraged you from doing other things besides watching porn?