Hi Ms Beverly,
Thanks for your query.
Firstly, painful sex was apparently due to dry vaginal internal lining as part of post-menopausal state (post-
hysterectomy). Hormonal replacement therapy will certainly be of great help.
Further, 
excessive sweating and abdominal problems are apparently due to Irritable bowels, which is commonly due to mental stress/anxiety. However, 
colonoscopy (if you can afford the cost) will confirm the diagnosis, while ruling out inflammatory bowel diseases and 
diverticulosis. Eat high fiber diet or, add psyllium husk/powder 20gms/day to your diet, which will be of great benefit. A regular course of anti-depressants + anti-anxiety drugs certainly gives relief. 
Regarding the cold sores in and around mouth, extending to the nostril, are most likely due to flare-ups of old 
herpes simplex infection. There is no curative treatment, though it disappears almost invariably, over a period of few years.
Also, oral herpes can also be associated with 
genital infection. You may give a trial of anti-viral course, such as acyclovir/vancyclovir which would relieve 
vaginal infection.
Consult your doctor and apprise him of my opinion. I am certain that he agree with me, order required tests, and- based on the reports-  will prescribe suitable treatment as advised.
If you find my response helpful and informative, do not forget an “excellent” rating to my answer, to encourage all doctors- engaged in social service- to render sound advice to the FREE queries. 
Fond regards and have a nice day
Dr. Rakesh Karanwal