Why she changed like that?!

Alright so it’s a quite short/long story between me and my mom, last year back in late July-Early August I was living with my mom and then one day she send me somewhere else to live (she basically rented a room at someone else and I was living with strangers, was there for about 4 months during this time, she moved in with her sister and she stored the furnitures from our old house, then back in late December, I moved back with her in a smaller house, and she then I have noticed a change in her behavior, she became controlling, toxic, demanding, falsing accusing me of doing things that I didn’t do, something that she wasn’t like before in our house, I literally feel stressed out, walking on eggshells everytime im around her, I don’t feel secure, I feel in danger, why do u guys think could have explain her this change in her and any ways to escape this situation?!