I have been on birth control for 2 months now, this being my 2nd month. I totally forgot to take my 2nd pill in the pack on tuesday and did NOT make it up. I continued on taking pills at normal times each night. On saturday i got sick and vomitted a small amount but i am sure it was longer than 2 hours after having taken the pill. Monday morning i had unprotected sex being only 4 days after missing pill and not making it up. I freaked out and took the plan b but it was after 48 hours, but still well under the 72 hours. What are the chances of me becoming pregnant?