Single mom struggling with motherhood?

I'm a single mother. I adopted all of my children through foster care. I am struggling alot in caring for one of my kids. I am an introvert, pretty extreme. I've been an introvert all my life. I never went to one party in college and spent my life alone. I feel I've been a good mother but I'm struggling alot right now with one child. My five year old talks every second of the day and has for the last couple of years. Every second of the day she is making sounds and talking. I ask her to please take a break and stop talking and she continues whispering loudly every second. It's fast speech with no pauses, one sentence goes into the next. I don't enjoy being around her anymore because it's so very uncomfortable to listen to her non stop narration and talking. I'm searching for solutions. I honestly don't think I will ever just get used to it. I sometimes wonder if she would have been better off being adopted by someone else who wouldn't struggle with her hyperactivity so much. But I'm here now and want to do the best I can. Do you have any ideas how I can survive this hard phase of life?