I'm having Morning after pill woes?

I was away on a business trip and when i returned my fiance and i got busy a little too quickly...but i took a morning after pill. Less than a week later i had cramps and bleeding like a period for five days. But now i'm wondering if i'm pregnant. I'm having breast tenderness and a little nausea. I'm a little scared to take a pregnancy test because i'm not sure if i'll be a good mother if i am pregnant. So am i being a little paranoid or did the m.a fail me?
Updates
+1 y
Thank you so much for the support. I've never taken a plan B before and trust me the experience was... anyway I'm NOT pregnant... I took 2 p. ts and eventually started my period.. though i admit now i'm not sure how i feel *shrugs shoulders*
I'm having Morning after pill woes?
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