confused, new to me

So for the last 15 years, my period has pretty much been the same for the most part. I'm supposed to start tomorrow. I'm still breastfeeding my 15 month old (not sure if that makes a difference or not) 3 days ago I stretchy egg white cm, but was told that's normal. Yesterday I was spotting a little bit of brown, && today I'm barely spotting a little bit of a very faint blood. Is this normal?? I'm soo confused, because I've NEVER spotted before my period, it just comes full force.