Our expert says:
Such intense pain is not typical from even vigorous thrusting, so I would encourage you to go the doctor.
Rear entry vaginal penetration is often deeper than face-to-face entry and so it is possible that deep thrusting can bruise the cervix (feels like the womb - lower abdominal pain). However I don't quite understand the pain down the back bone, and the 'unbearable' shooting pains so rather be safe and have this checked out.
Claire - SASHA
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