Hello. Thank you for your query.
I am sorry for your present condition. I shall try to explain some causes along with some diagnosis.
Anxiety is a common condition seen almost in every other individual. But if it is of long standing or if it interferes with daily activities, it should receive immediate attention and you should consult a physician for this. If you are agoraphobic and are worried about going out and consulting a doctor, I would advise you to request the doctor for a home visit.
Diarrhea and increased urination should be investigated further. A complete urine examination along with stool examination is very much required in your case. If the results show any abnormality such as blood in the stool, a consultation with a gastroenterologist along colonoscopy (a diagnostic procedure where a video probe is inserted through the anal canal to visualize the area and to take biopsies) is required. Neutrophils or blood cells in the urine indicate that there is infection associated either with the bladder or kidneys.
Nevertheless, as you are 73 years old and postmenopausal, I request you to make an immediate appointment with your physician to make an immediate step towards a healthy life.