Unless you are experiencing some trauma with intercourse due to friction, rough sex, lack of lubrication, etc. I would not expect any changes of this nature that would be caused by a different sexual partner. You might try taking it easy for a few days to see if things settle down. When you do have intercourse, be sure you have plenty of lubrication and don't go too fast with the heavy thrusting.
The answers in online forums are for information only and are not intended to substitute for medical advice and care. Please see your personal health care provider for further evaluation of your individual case.
Debbie Miller, RN