There are plenty of free clinics around. If you're worried then I'd suggest going in, and having her have a pregnancy test.
I highly doubt your girlfriend is pregnant if she took Plan B that soon after intercourse but you can ask her to take a home pregnancy test within the next week to find out if you conceived. In the end it doesn't matter if anyone on here thinks she is pregnant, only a hpt or a blood test will give you the answers you seek.
well it has bn almost a month since u yall had unprotected sex.. only otha way to find out is by taking a test. i kno it has bn long enough to tell weither or not she is.. keep us posted..gudluck