I took plan b one step about a month ago and got my period one week later when I had just had it two weeks prior. It's been three weeks since I had my period now and I'm spotting randomly. I spotted two days ago but not yesterday and I spotted again today but the spotting is very light like only once a day. Does this mean anything? Is it just from the plan b pill? Is there a chance I might be pregnant even though I had my period? Should I take a pregnancy test?