I had unprotected sex. i took a plan b the morning after, this morning would be the second morning. i still feel a little different, i have some sort of morning sickness. should i take another pill?

Follow package inst.: Read and follow package's instructions. Plan B is not to be used as one's primary birth control. A normal person would not be taking it twice in a month... but maybe once every 5 or 10 YEARS for emergencies. One should avoid sexual contact until a primary form of birth control is begun. One may call her Ob-Gyn doctor now, to ask about IUD's which work as both emergency and ongoing contraception.