Took plan b 2 weeks ago, supposed to have period wednesday and have been spotting with mild cramping for 2 days. its pinkish brown. could i be preg?

Maybe. Maybe not.: Taking Plan B (or any other emergency contraceptive pill) can alter the timing and quality of the current cycle's menstrual bleeding and of the upcoming cycle. One should check a home urine pregnancy 3 weeks after taking Plan B, to make sure one is not pregnant. Also, if having sex, one should be sure to use good contraception all the time, so that Plan B is not needed in the future.