Sometimes polyps develop in the womb lining (endometrium) and this can lead to spotting or bleeding after sex.
"Polyps in the womb lining
An endometrial polyp (uterine polyp) is a lump in the inner lining of the womb. Most are benign (non cancerous) although some may contain small areas of cancer cells. They may be flat or mushroom shaped. They can be a few millimetres in size or several centimetres. They often cause no symptoms but can cause irregular menstrual bleeding, bleeding between periods, very heavy menstrual bleeding (menorrhagia), and vaginal bleeding after menopause.
Some polyps go away on their own with no treatment. Larger polyps can be removed surgically. They often come back and can be removed again."
Let us know how you get on with the nurse.
Taz x