Does this sound like an unusual period?

I started my period and all was normal. It started slowing down day 3 and disappeared entirely on day 4. No Period for over 24 hours than it starts back up again, all brown blood. This lasted for than 4 days.

My periods usually last 7-8 days. Could this mean pregnancy? What else could it be?

I have an 11 month old and that was my 4th period after finishing breast feeding. All others were normal.