I attempted to have intercourse last night and it was extremely painful so I went in the bathroom and discovered on the inner part of the entry had a cut anout a 1/2 inch and deep. When I woke up this morning to use the bethroom it was painful and there was blood. What could this be from? Please let me know. I am still in pain.

With such a deep cut, I'd be worried about infections. Best to play it safe and call your doctor.

Call your doctor always best to be safe and its probably something not much to worry about. So don't worry yourself talk to the professionals.