You should see your gynecologist to get your hormone levels tested. A good thing to do that will really help your doctor track your symptoms is to keep a calendar. I have an app my phone that is really good; its called My Calender (android) Keep as much info as you can. Do you use condoms? Before I was married, my husband (then boyfriend) and I had to use sensitive condoms bc I have a latex allergy and it would cause me to tear...
Could be things were too rough. If it keeps up beyond one time, go see your gynecologist for an examination.