Tan I remember while bf DS that there were a few times I had fertile seeming CM, but nothing happened - could be that your body is trying to gear up to O, but doesn't necessarily get there - it takes a while for the hormones to get themselves together (was around a year before I got AF back).
yep this is what happened to me.

DS is 16 months old and I just got my first AF this month.
I had noticed fertile type CM on and off over the last three or four months I guess?
I can take your body a few "tries" to reach the hormone level required to actually release an egg...and each time it tries you will get fertile type CM.
I would be thinking about birth control options now and not relying on breastfeeding because it sounds like your fertility is returning