My Period Was At 17 November,2015 ....Me N My Bf

My period was at 17 november,2015 ....Me n my bf accidentally had sex without protection at 26 November ...few hours later I took an emergency contraceptive pill ....then at 4 December I noticed a little bleeding from my vagina ..I don't know whether its a period or not ...cos it was really less ..like spotting blood ....the spotting lasted for 4 days ......then at  11 November ,2016  I had that spotting again ..it lasted only 2 days ......(we had not have any sex after 26 November and I'm not in contraceptive any pills ).......I don't understand ....am I pregnant ? Is that possible