Plan B symptoms normal?

So I took Plan B 5 days ago and I was experiencing sleight left pelvic cramps and thick white discharge. That has gone away and now I am bloated and have back pain. Not only am I bloated in my stomach but I feel like I am bloated in both sides on my pelvis! I should start my period in 6 days, could I be pregnant or is this just the Plan B? I am so worried. :(