LTR for 7 or 8 months now. She's lately started arguing a little bit and saying I'm too harsh with her when she upsets me.
For instance, a few days ago she was saying I make her feel small and like a child. I tried to give some comfort with a kiss and said I think she is great. She kept complaining, so I said I didn't want to argue, and she kept going on saying she never knows where she stands with me. She said she never knows if I'm about to dump her and that she is always walking on egg shells.
I tried to give her some comfort again but she kept whining, so I calmly told her to stop and that I was not going to argue with her. She pouted for a little while but finally apologized and all was good.

Today, it was pretty much the same scenario repeating. I'm thinking this must be a shit test. If she is really worried about me dumping her or that she is walking on egg shells, I feel like she probably wouldn't keep repeating this same behavior.

Her SMV is fairly low and her self esteem is fairly low, so maybe that's part of this. But I don't know what else to do. I am getting tired of the arguing and don't know if there is a way to fix it or if it's time for me to get rid of her. She is still submissive and does everything sexually and seems to be crazy about me. She never nags me or complains about anything I do or acts disrespectful. The arguing is always about me being harsh with her or making her feel like I have one foot out the door or her having to walk on egg shells.

Is this fixable? Am I not showing enough beta traits, or is she trying to fight me for power or something?