I have always been regular never spotting in between.  Last week was the fertile week and we were active.  Sunday I started light spotting and it only lasted for a day.  Nothing major just a very little pink mostly dark brown.  Ever since then my boobs have been beyond sore.  I didn't know if it could have been implantation bleeding or if all symptoms are too soon.  I still can't test until next Monday.  Any thoughts?   We've been trying for over a year. The disappointment is getting old!