Urgent or not, only time will tell. First, don't believe a guy who tells you that, ever. Sperm can be introduced into your vagina long before he ejaculates from pre-ejaculate which often appears at the tip of the penis. This may contain sperm.

If you normally use a condom, he owes you to use it before there is any genital contact. If if isn't, or he won't use a condom, you should look into a safe, reliable form of birth control on your own and use it.

This would save you from having to ask this question and worry so.

Here are symptoms of early pregnancy from the American Pregnancy Association. You most likely would not experience them this early but apparently, they may be noticed several weeks after intercourse. The only way to KNOW if you are, is taking a home pregnancy test if your normal period is more than a week late, or be tested by your doctor.