I had intercourse two days ago, and now I seem to be bleeding regularly almost like a menstrual cycle. However, I am on the nuva ring so my cycle is not due. What could be the reasons for this bleeding?

It's possible that the intercourse was rough, which may cause you to bleed. It could also be that your hormone levels are a little bit off, or the nuva ring is no longer functioning. It's impossible to tell unless you see a doctor.

Was the intercourse painful? Were you sore afterwards? Are you feeling any other symptoms?