Hi Girls

I am really confused as to what my body is doing at the moment, if this has happened to anyone else I would love to know.
Ok, so I have been b/f for 12 months now and no sign of AF. In the last month DD has dropped quite a few feeds. On Sunday night I had a light bleed, not bright red, more brown. Thought whoo hoo AF is finally here, but then it stopped. I didn't have any cramps.
Is this normal for AF to be returning like this? Does this mean I will get a normal AF next month?
I am desperate to start trying soon, so would dearly love to know if this is how the body starts up.