Thank you for your question.
Chancroid is only one type of ulcer that can occur on the genitals. There are several others that are of greater concern. Unfortunately, the only way to get a correct diagnosis and treatment is to show it to a doctor who specialises in Skin and DVD or genitourinary medicine.
Please don't delay as early diagnosis and treatment will prevent future problems from occurring. Also please do not feel shy talking to your doctor about your sexual practices. They have most likely heard it all before and also treated several people like yourself.
hope this helps