Hi., Switch positions. If you experience sharp pain during thrusting, the penis may be striking your cervix or stressing the pelvic floor muscles, causing aching or cramping pain. Changing positions may help. You can try being on top of your partner during sex. Women usually have more control in this position, so you may be able to regulate penetration to a depth that feels good to you.... Don't rush. Longer foreplay can help stimulate your natural lubrication. And you may reduce pain by delaying penetration until you feel fully aroused...Use lubricants. A personal lubricant can make sex more comfortable. ..Consult Sex therapist...