I have a huge problem? I need answers?

Today I got in a huge argument with my mom because she believes that my health is going to fail because she thinks that I'm lacking calcium because I don't consume dairy. I am vegetarian and I avoid eggs and dairy whenever I possibly can. Out of the blue, she asks me how much almond milk I drink per day, and I tell her that I drink about a glass a day which is just about one serving which accounts for about 45% of my daily calcium needs. There is more calcium in almond milk than in actual milk and she has the audacity to say to me that she "knows" she is getting her calcium and she "knows" that I am not, but I consume something that gives more calcium. She thinks that calcium comes from no where but milk (and of course my almond milk). I tell her that I eat vegetables, fruit, beans and seeds (and sometimes flaxseed) and those give me lots of calcium. She says "you're still not getting enough". I eat more of these foods than she does plus the almond milk and I don't see why she feels that I'm lacking calcium. Later she notices that my lips were chapped and then she said "I bet that's because you don't drink dairy" and it was the most uneducated thing I have heard her say in my life. How can I go about this? What do I tell her? How can I persuade her that I can easily get the calcium that my body needs without drinking the milk from another animal?