Noticed Bleeding During Intercourse And Have Dermatographic Urticaria. Ovarian Cancer?
Dermatographic urticaria, or dermographism, can exist as an isolated phenomenon (that is, not associated with another condition), or it can be related to an underlying disorder, such as thyroid disease or an autoimmune illness (e.g., lupus, sarcoidosis, or rheumatoid arthritis). Uncommonly, dermographism is associated with an XXXXXXX malignancy. Many of these disorders can cause menstrual irregularities, though, so your menstrual history alone isn't particularly helpful in zeroing in on your diagnosis. (It's also possible your dermographism and menstrual problems are totally unrelated.)
I did come across one case report of dermographism and sarcoidosis in a 43-year-old woman who had ovarian cancer, but such a presentation seems quite rare (this case was cited in the Nov/Dec 2005 issue of Indian Journal of Dermatology, Venereology and Leprology). Since ovarian cancer is unusual in women younger than 40, such a presentation in a 31-year-old would be exceedingly rare.
Unfortunately, it's impossible to diagnose your condition without a thorough evaluation. You're statistically more likely to be dealing with thyroid disease or an autoimmune illness than an underlying malignancy, but your doctor clearly had her reasons for ordering the ultrasound; if that study doesn't identify any problems, she'll undoubtedly order additional tests.
I hope that answers your question, and I hope things go well with your ultrasound. I'll be available if you have additional concerns.
Good luck!