Spotting as in your menses is returning?
I had my menses visit me again when I was bf-ing on the 3rd month. I weaned my baby at 7 mths. So, no your bf-ing days are not over, though you'd need to pump more often or latch as much as you can back home to ensure that your supply dont't dip too much
But during your menses, due to the hormonal changes going on in the body, the supply during flow days will tend to dip a little.