New job in LTC and not feeling too sure about it

I have just started a new job in nursing home. I have been out of nursing for almost five years due to chronic physical disability. My health has stabilized on meds. I have always worked in behavioral health. Although, I did work very briefly in a nursing home right after I passed boards back in 1997. I only worked about two months. This nursing home was horrendous, and their turnover rate is very high. I see an ad in the paper constantly for that nursing home.

However, this nursing home that I am working at now has a very low turnover rate. They hardly ever hire new nurses. That is what made this job so attractive. And, they have good reports with the state.

I have been working there almost a month now. I am feeling that this job is not a good fit for me. First, of all I am supposed to be working a job that is not physically demanding and too stressful. Of course, it is both. Also, my dr. said only PT. Well, I am supposed to work three days a week. But, since I am having such a tough time, the DON thought I should work four days a week, until I get the hang of it. Honestly, I feel more overwhelmed at the thought of working four days a week. But, I can understand that they want me to hurry and orient. I was fine when I had another nurse following me. But, when I have been on my own, I am a basket case. I am very slow. I go home and remember things that I did not chart. e.g. amount of supplements residents drank. There is just so much. I am there at least forty-five minutes over just doing my charting.

I do get nervous just thinking about going to work. I am having anxiety. My husband wants me to quit because he is afraid that I will have an exacerbation of my illness. I don't know what to do at this point. Do I continue to work and hope that it will get easier? Do I try to stick it out because they have been doing a lot to help me? e.g. making me reminder notes on who gets fingersticks and vs at certain times. Also, have helped me on things that I didn't have a chance to get to. Honestly, I feel that I am way too overwhlemed and way too slow. I am wondering if it would be better for me to quit now, as I don't seem to be improving much. I am thinking that maybe I should quit before too much times goes by, so they can hire another person. But, I will feel tremendously guilty for quitting. I feel obligated after all they have tried to help me, but I am just not picking it up like I should. I don't know what I was thinking! I had reached a point where I just wanted a job, even if it meant jeopardizing my illness. And, I did not divulge my illness to them, as I thought that I would never get hired. So, I am feeling that I was deceitful. But, I think that I need to be at a slow paced office and making less money.

And, if I do decide to resign, should I do it soon, or try to stick it out some more? I just don't have faith that I will be improving to the degree that I should. How do I talk to my DON?