Got in huge fight with girlfriend?

Honeymoon's over. chances are at first she thought it was odd, maybe even cute, then over time might have got annoyed, and if at any point in time you did it and she was in a rush then that could mean relationship over. It's fine to check to make sure you have your cards, but it really shouldn't take long at all. But if you take care to make sure you always have it and put it back IN the store you wouldn't have to check again at the car. And the locking car a couple of times would drive me crazy. They have therapy for these sorts of things. Either way, it's something that drives her crazy and you've pretty much told her you won't change or stop. Sounds like she's held this in for a while, or has mentioned it politely or hinted, and you didn't get the hint. Part of being in a relationship is accepting that nothing's personal anymore and you both need to try to be as least annoying as possible to eachother and get to a point where if there's something about the other one you can deal with it and find ways around them and make sure they don't affect the other one. Because it won't go away in time. Hence all the "compromise" and "effort" people speak of when talking about relationships being hard work.

I see how it would be annoying but everyone has some annoying little quirk and it really doesn't seem like that big of a deal. I mean I think that she should just suck it up. If it's something you can't help or that makes you feel better why is she so angered by it especially to the point of calling you names. If your relationship is important to you talk to her. Have her make a list of the things that bug her the most and then pick 3 or 5 that you will work on. It's all about compromise. For instance, instead of using your atm card around her you could get cash ahead of time so you won't have to check all your cards later or leave everything but your atm card at home so that you won't have any other cards to check. When you go somewhere have her drive so you won't incessantly check our car or give her your keys so you can't click the lock repeatedly. Again, I don't think it should be this serious and I think there's either more you aren't telling us or something that she isn't telling you...

Those are quirks. Everyone has them. And when two people are in love, quirks like that might be slightly annoying but aren't a really big deal. I mean you're not even describing a quirk that impacts her like leaving wet towels on the floor or leaving the toilet seat up.

I have a thing where I always ask my husband if my purse is on the floor in front of him in the car even though I just put it there. It always is and he finds it a little annoying when I ask but he doesn't call me names or start a fight because of it.

That she calls you names and starts fights over your need to lock your car twice implies to me that she has more problems than you do.

You don't need to be with someone who calls you stupid all the time. That is not a healthy relationship.

It would bother me. You are not stupid or anything like that.