My mom wants me to get a full physical exam to see if a virgin?

Dubious. This sounds like an element of dispute between you and mom. She does not trust you (sexually) and perhaps your answers do not satisfy her. Having a doctor solve this dispute by discovering whether you have an intact hymen or not, will not truly answer the question and more important it will not re-establish trust between the two of you no matter what the answer. Seek counseling.