Hello, Lily Jean, and welcome to the forum!
Semele kindly alerted me to your post, because I have not been keeping up with many threads on the forum lately. I'm a 68-year-old woman who has had PD about 17 years. I was a Californian for 52 years, now live near Portland, Oregon. I have no medical credentials whatsoever but do some volunteer work at my PD treatment facility and have encountered many cases of this disease.
It sounds to me as if Parkinson's is not your mother's main problem. Her doctor called her case mild, and the symptoms you describe are extreme for a newly diagnosed pwp. Her lack of awareness, her loss of speech, her confusion, and repetitive actions (counting and tracing patterns on the furniture) sound more like symptoms of Alzheimer's disease or some other form of dementia. Your description brought back memories of my own mother just before her death a year ago at 95. She had had a series of small strokes and then a major one, and her behavior was similar to your mother's.
All I can recommend is further medical consultation. Can you get a referral to whatever specialist your mother's doctor thinks appropriate? You mention that she is currently on medication. Certain PD meds can cause compulsive behavior or memory problems, but I'm not sure the side effects ever reach the extremes that you have recounted. I really believe you do not yet have a full diagnosis, especially since her symptoms have worsened . The doctor has not seen her at her worst yet, right? I'd suggest another visit to the doctor soon!
I'm sorry not to be able to help more. But please know that I'll be thinking of you and your family and hoping that you do find help from your medical community there in La Habra. You sound like a very responsible young woman and I'm sure that makes you feel even more intensely the stress your family is suffering. I wish you the best at getting through this difficult time. If you need to talk to someone, please feel free to send me private messages. I don't know if I can be of any service, but I listen and I care.