Not supportive family

I dont even know where to begin this is going to be long. Throughout my wedding planning process Ive been so happy to see the outpouring of love and support from all of my/our friends and my fiancees family but for some reason very recently my mom has just been so hurtful. To start hasnt really been involved in the whole process. When i went to try on dresses and pick one out all of my friends came from all over california (my MOH drove 16 hours total just for it!!!) and re arranged their schedules to be there. My mom and sister came from an hour away and showed up late, and then said she had to leave early to meet someone for dinner (even though it was only like 2 pm at this point). I said fine not a big deal go ahead then found THE dress at the last store! Everyone was so excited! After I leave I tell my mom and sister and send them a picture and they call me screaming at me for deciding on a dress when they werent there. I had 4 girls in my car and it was on speakerphone and it just was dead silent after, they completely ruined the mood and excitement i had for this special moment. Also I want to note that Im paying for everything myself if it makes a difference for these issues. I invite only my mom and brother to come to the caterers tasting and cake tasting and she comes... then proceeds to get in an argument with me at my caterers house over how im not helping her enough with moving houses. From january through march I spent the majority of my weekends (im a nurse and work every other weekend) helping her move and she has once again not helped me at all with any planning needs, yet this move argument comes up on a regular basis. After that my fiancees sister and mom (who live in Arizona and Im in California) want to throw me a very small bridal shower just for Arizona people because for one these girls wouldnt be able to come to a California shower but for two my fiancees sister is due to give birth around the time of my big California shower and wouldnt be able to make it and felt bad. I thought it was a great idea to have two showers and was really grateful. My mom and sister though flipped out and said how rude it was for them to do this (even though its nice for me and no one from California was coming and they were invited of course). I didnt have to do a thing and they set up a beautiful shower for me and I had an amazing time. Then for the California shower which my mom agreed to host around December, already rearranged my weird schedule around, save the dates are out and everyones excited- every time i try to talk to her about progress on planning there is none. My MOH and another bridesmaid check in with her regularly and agree to do theme and decorations but she just wont plan anything. Im at the point where im going to just have to do it all myself because its about a month and a half away! Finally I take her shoe shopping with me just us and she decides to push this new idea of a prenup at me at every store. I absolutely do not want a prenup, it says to me that youre going into marriage not believing its going to work, and its not like were super wealthy or have a bad distribution of wealth anyway. My fiancees an accountant im a nurse we have the same income currently and should remain around equal through our careers. She pushed it so hard non stop I snapped and told her to stop. I told her all of this and why it was hurtful and she just complained about her move and said I was “trying to take away the honor of being mother of the bride” from her. We’ve always been close but Im currently not speaking to her. I dont know why shes being like this its not her usual behavior and Im nervous that as of right now I dont have a shower either. Its just ruining the entire experience right now.