I wouldn't worry about getting tested. The Epstein-Barr virus infects certain white blood cells, the ones that fight infection in the body. Symptoms cover a broad range, and usually involve fever, sore throat, swollen lymph nodes, and exhaustion. The fatigue can knock you out for a week or two at first, when you barely feel like moving. After the tiredness and weakness go away, it's important to take it easy, but you can go about the normal activities of life.
Most people get through mono quickly and uneventfully.
The virus will stay in your body for the rest of your life, though it doesn't produce any more problems. Your daughter should rest as much as she can to help her body recover faster. It would be wise to drink lots of fluids, and gargle with saltwater to relieve her sore throat. She shouldn't take aspirin, because taking aspirin when you have a virus can lead to a serious condition called Reye's syndrome. Tylenol is a good substitute.