Breaking up with mom

I have been dying to vent on here but last night I had wireless connection issues and then today I was busy at work with no time to update, but I am finally home, at 12:30 AM...

Here's the thing, last night, in the car, on our way home with my Dad, my mom, my husband and my daughter, my mother had the only outburst after I snapped at her over a blanket. It's really hard to explain but basically I was buckling Aixah in her car seat and my mom told me to grab her blanket like three times, so, very annoyed, I said (in Spanish), 'just give me a sec, ok.' And she flipped. Just went off about how I have this habit of disrespecting her. Victor was sitting all the way in the third row and he asked me what was wrong and if we were arguing. I'm like, 'yeah, she's flipping out over me telling her to hold on.' And then she really went all out and started yelling and saying how she wasn't my friend, or my Aunt, or a sister that she was my mother and as such I needed to respect her and that the next time I disrespect her [and now her voice gets really high-pitched and hoarse and it sounds like she's crying and she also looks like she's trying to climb over the passenger seat to reach me] she will smack me across the face...[at this point I think she's going to get an asthma attack or a panic attack or hyperventilate and I'm on the verge of tears and just confused on what in the heck just happened, you know?]

My Dad had to referee and told her to calm down and I honestly had nothing to say. The only thing I said was, 'what have I done to you today?' Absolutely nothing, but apparently she must resent me for something, right?

My mom isn't someone that cries and this is the third time that I have made her cry. And it really hurts. We aren't talking, which has NEVER happened before and my mom had my Dad call me today to ask how Aixah's appointment went. 'Very mature mom', says the daughter who felt like she was 10 years-old yesterday after her mom yelled at her in front of her husband...

I think the best thing to do at this moment is put some distance between us. I'm like, breaking up with my mother, how awful is that? And all I keep thinking is, 'mom, please don't die before we get past this.'