Return of breastmilk a sign?

Tiffany

I'm 10dpo and 4 days until AF, tested negative today. But my boobs suddenly leaked a small amount of milk and I haven't nursed in 6 months. I couldn't even hand express milk out of my left boob for the last 3 months of nursing...then suddenly both leak a little this evening. It looked more like colostrum than milk. I don't want to get my hopes up but has anyone experienced this being an early sign, before getting a bfp?