brown spotting

[porkchop]

on my fifth day, i had sex with my boyfriend. after a week, i started to have very few brown spotting for three days already. whats going on? am i sick?

[kayladawn]

So here's whats going on..
I have a boyfriend, but haven't had intercourse all june (for the past month!) I started my period normally this month(june). After that period I knew i was going onto birth control and didn't want to risk NOT passing the pregnancy test before i get on the nuva ring. i had a doctors appointment weeks ago and took a pregnancy test i was negative.
im not supposed to start my period till the 1st week sometimes 2nd week in july. I started my period Sunday night?!! and it went through Monday morning. a Brown color? then was gone for the rest of monday??? i was extremely stressed yesterday actually in tears. Is there anything going on??? Can Anyone can help me??? am i stressed?? am i having a irregular period?? i cant be pregnant! this has never happened to me!