We always use a condom, never broke.
Day 27, i normally have heavy periods, but all i have been is spotting over the past 3 days, of and on
Periods can be wacky sometimes for no reason at all. I wouldn't worry about. If it continues for a few cycles then I would see a doctor.
~*~Smile, it's the second best thing you can do with your mouth.~*~
if you are using condoms there is a small chance that you may be pregnant. if you are - and it is a big if - by day 27 (and assuming this is the end of your normal cycle) you could have a small bleed as the embyo implants in your uterus. the process of implantation involves the penetration of the lining of your uterus which is thick and full of blood vessels, and breaking these vessels may lead to bleeding.
I reckon you should try a pregnancy test just to make sure, and if you notice any abdominal cramping, increased need to pee or any changes to your breasts than go to a doctor and have a pregnancy test.
the earlier you know, the more options you will have regarding pregnancy termination, if that is something you choose to do.