Had unprotected sex sunday @7a.m i was fertility on wed-sun and monday i was ovulating took plan b on tues.@3p.m am i pregnant?

Depends: Usually if you take Plan B within 72 hrs of unprotected sex you should be ok but watch carefully for period and if late then check with a pregnancy test. Also see your dr for contraception like birth control to prevent unwanted pregnancy as well.

Sounds like you took: Plan B One Step about 56 hours after sex. Plan B One-Step is up to 89 % effective when taken within 72 hours (3 days) after unprotected sex. It can reduce chance of pregnancy by up to 95% if used within 24 hours. It continues to reduce the risk of pregnancy up to 120 hours (5 days) after unprotected sex, but is less effective as time passes. It is most likely to be effective.