implatation or random?

so about 2 week's ago I had a browning bloody day is was not much at all just a litttle.    I never had inplaction beed with other babies. I have been fully breastfeeding Emily, but since this beeding she has been really unsettled and my supply has seemed to drop alot. I don't want to read too mcuh into all this but could it be that I am pg? Any other Mum's found this while fully breast feeding and found out they were preganant? I am not worried either way its just I have to stop my med's for the first 3 month's. I know easy soultion is to test, but I don't have any here.

The only thing I had with bf and pg was sensitive nipples and being way too tired. Might this be the first sign of your AF coming back? She may well fuss at the breast if this is the case as the hormonal change can make the milk salty.