Plan B (levonorgestrel) can alter the menstrual periods. This leads to unpredictable patterns of cycles. Levonorgestrel is a progesterone hormone. The progesterone action is required for contraception and it also causes these alterations. Now, as you are having period like bleeding, it s highly unlikely that you are pregnant. Levonorgestrel has this as side effect. Cooming to the point of frequent micturition, you are most probably suffering from urinarybtraft infections. That will explain your other symptoms. I would recommend you to have a consultation with an OBG specialist and get medications for infections. I would also recommend you to avoid taking emergency contraceptive (levonorgestrel) in the future rather opt for long term ora contraceptives or any other methods. Emergency contraceptives has higher rates of failure and interferes with your cycle. I hope the above information helps you. Thank you for writing into healthcaremagic.