Blocking, extreme pain at penetration is called dyspareunia. Common causes are vaginismus (involuntary tightening), inadequate arousal, thrush, endometriosis, or a hymenal-tag issue. It is very treatable once the specific cause is identified.
Next Steps
Please book a gynaecologist consultation. A pelvic exam and history usually identify the cause. Depending on findings, treatment can range from lubricants and pelvic-floor therapy to specific medical treatment.
Health Tips
Please do not force intercourse through pain. That can make the underlying condition worse.