Unprotected sex, used pull out method, and plan b within 30-60 min. i know it's possible to be pregnant. but how likely? and when can i see symptoms?

Unlikely: Pregnancy rates are 17% for "normal couples" without protection. The pregnancy rate in this situation is less than that but difficult to determine. Symptoms usually appear once a woman has missed her period, however, some women know almost immediately if they are pregnant.

Very low risk : Plan b isn't perfect, but it reduces your risk of pregnancy by around 90%. You can test for pregnancy as early as the day your next period is due.