My period finishd on 6/12/13, i had sex on 20/12 i then got a light dark spotting on the 22/12 it lasted 3 days, 2wks early, don't take the pill. i preg?

Pregnant with irreg: Your period is by est. You had relationship around midcycle thus you had a chance to be pregnant esp following light or brown discharge days later. Do a pregnancy test if negative then trace 3 months periods followed with family planning with any methods of your choice then you can retrun to your routine way as you please.