Forget everything you think about fair. She's going to yell, she's going to slam doors, she's going to pick stupid immature fights and she's always going to win. Why? Because, if she had the need she could go file a restraining order and say you were verbally threatening, destroying her clothes, destroying the house, and psychologically harassing her with your bass. That's it, you're homeless. Keep that in mind every time you feel like raising your voice or slamming a door.
Odds are though, you missed like five different facial expressions that should have clued you in to what is going on. The fact that you reacted by getting angrier is going to have her spooked a bit, she probably felt she communicated with you everything she needed to, before you strummed your bass. Therefore, your reaction has probably been perceived as a little extreme.
Not to let you think you need to be a doormat, but your anger level should only ever trail hers and you should be pretty sure it's socially acceptable. Also, if she's ever angry and you're not angry at all, as in completely unaffected, that's a bad sign too. Which sounds like what happened when you strummed the wah,wah, wahhh.
Now to readdress fair between the sexes, if I gave you five pennies and I get a nickel that's fair right? Well yes and no, you have to carry and count five pennies and I get a nickel. On the other hand if I lose a nickel and you lose a penny is that fair? Nope, that's not fair either, but it's about as close as things get. So fair doesn't always mean the same and not being the same means some things are not going to be fair, but if you care you have to try.
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Your neurodiverse (Aspie) score: 142 of 200
Your neurotypical (non-autistic) score: 52 of 200
You are very likely neurodiverse (Aspie)
"If I knew that it was fated for me to be sick, I would even wish for it; for the foot also, if it had intelligence, would volunteer to get muddy." - Chrysippus