breast feeding, periods, CM- HELP LONG!

Hello moms! Just a little background I am about 11.5 months in and still going strong breastfeeding! After having my daughter I had my initial postpartum bleeding that lasted about 3-4 days but wasn’t terribly heavy at all. Since then I haven’t had any bleeding or symptoms of a cycle coming whatsoever. Well just about a week or so ago I started having a good amount of discharge that seems to be the color and consistency of fertile CM. Could this be the beginnings of my regular cycles returning? I did take a pregnancy test just to rule that out and it came back negative; I will be taking another one in a week or so to make sure! Any advice or help is so appreciated. THANKS!