Plan B // Birthcontrol ?

So I have been on birthcontrol for 3 months (placebo week at end of 3 months). 3 days before my placebo week i stopped my birthcontrol because of mood swings. On the third day i had unprotected sex with him pulling out and took plan B within 15-20 hours. The next day and for 5 days I bled as if i had my period. I took a pregnancy test 14 days later in the morning and it said negative, but i'm confused on whether that bleeding was my period and whether or not I am at a high risk for pregnancy