I Had Unprotected Sex On 21/08 And I Took The

I had unprotected sex on 21/08 and i took the morning after pills arpund 8-9hours later. I had it on my last day of period or probably when my period just finished (only spotting left). 3-4 days later i started to feel a PMS kindda syndrome such bloating and craving also spotting. Is that normal? and is there any possibility that I'm pregnant?