Could be happened if lady is virgin. I agree as it happened to me. I tried it before how can I control my emotion and it works!
If you have principles, dream that you want to achieve first, I believe you can set aside sex first. But if you always carried by your emotions, then it will be hard to control doing sex and think come what may This mostly happens to students, they have fears of doing sex
Happened to others too as first night is really ouch Better luck someday