Painful intercourse, stabbing pains in abdomen and cervix, lasted 30 mins approx. Located large lump near opening of cervix. Post csection 6 weeks.

Very abnormal. Your symptoms are very concerning and should be evaluated by your gynecologist. There could be abscesses,hematoma, or a growth near the cervix causing back pressure into the uterus.
GYN. It is quite difficult to feel your own cervix: you may have a vaginal infection or abscess which requires an internal pelvic examination and cultures.