okay, a couple things could be going on. since you went off the pill, your body may just be getting used to a regular cycle again. Did you have regular cycles before going on the pill? If not, you will likely return to irregular cycles.
as far as not using protection...obviously that puts you at a pregnancy risk. Not sure if you thought you couldn't get pregnant so close to your period starting or ending--that isn't the case. So be careful.
Back to the concept of implantation bleeding, knowing that you haven't been using protection, this becomes more of a concern since your bleeding was so short.
Though, my guess would be it is your body still trying to regulate itself after the use of hormonal birth control.View Thread
I am on the pill and have had a similar bleeding scenario you describe. which in theory shouldn't happen because pills are usually clockwork.
has your period always been on time and ended on time?
have you been on birth control pills and stopped? did you at any point in the last month use Plan B?
My inclination would be not to worry about it. if it continues, definitely consult a doctor.
Are you using protection? in theory a short, light bleed outside of your period could be implantation bleeding. However, the timeframe you suggest of your period ending and the intercourse would make implantation bleeding unlikely.View Thread