Gina, I see nothing but a woman in your avatar pic. I also know for a FACT that family (whether parent or not) have a VERY hard time seeing us as any gender aside from the gender they thought we were. This is also true if you were born to where you did/do look like you can pass as a man/woman yet they only see you as what they thought you were and still tell you, you only look like a man to them, or for others a woman to them. It's called denial as well as not being able to see the truth because you originally thought something else to be the case. (In a way that's a "type" of denial but not quite)
As for your mom, look, I'm going to be blunt with you here. While it's true she may come around, there is a good chance she won't, especially if she's a religious person and this is what's causing her to fall back on her denial. My Dad, I have pleaded with, explained things, told him it wasn't his fault yet he refuses to hear and I mean actually HEAR a word I say and it goes out his other ear and instead he blames himself (His own fault, and I shan't worry about such a detail like that when it's his own fault for not listening) and also insists "Oh I'm convinced it's because of this or that" etc. etc. etc. I mean REALLY, as if the baby formula and food etc. we eat is going to REALLY make a person trans and even if it does, I don't believe for one second that's the case with me! So as a result he's done all he can to try and keep me from transitioning. Pretty much what I'm hearing you say your mom is doing to you, is what my Dad is doing to me. It's basically a way to make you feel bad and revert back so they can keep all this under a rock. Whether religion is involved or not I'm certain it's not just a matter of religion alone.
So, for me and my dad, seeing as he's moving away soon, I'm going to let him know when that time comes if he expects to have ANY kind of relationship with me besides business, then he'll refer to me by the proper pronouns, name and so on and he WILL see me with nail polish, a purse, feminine looking clothing etc. He won't run or ruin my life anymore and if he can't do this then he won't have a relationship with me his daughter as his son doesn't truly exist. Oh and incase you're wondering, yes he's a religious nut but I can tell he's using it as a shield/excuses so he doesn't have to face the truth. I may even mention that to him as well.
My point here is, DON'T let your mom tell you who and what you are/look like etc. because it SURE AS HELL isn't who and what you are/look like etc.! Don't let her use those underhanded tactics and try and scare you into submission. BE YOURSELF and be PROUD of who you are! And just remember, she may never except you for who you truly are but it is your choice if you continue to have a relationship with her if she really doesn't accept you for who you are. For me, I've made my choice, which is, either my Dad accepts me or good bye. Maybe that will change someday but only time will tell and I wish you and your family all the best.
Oh and no you aren't making a fool of yourself.