Took plan b, 2 weeks had period on time and unprotected sex on 1day, now bloated and weight gain and stringy white discharge possibly 4 weeks.. prego?

Unclear: It sounds like a Plan B worked. You had unprotected intercourse took Plan B and then had a normal menstruation. Its unclear as to when you had the next episode of unprotected sex? Did you have it on day 1 of your cycle? Any episode of unprotected sex can lead to pregnancy. Take a home pregnancy test. But also consider seeing a doctor for more effective form of birth control.