When did people's breasts start leaking?

I'm 16w+1 today and have just come to the realisation that the small patches on the bed weren't something I'd spilt in the last day or two, and are in fact my breasts leaking. I had no idea this could start this early?! It started yesterday (I think) and is now happening a bit during the day too.

Super annoying as I almost exclusively go braless and now cannot (don't particularly want to be visibility leaking while I'm out and about 🤣) and don't currently have any bras that fit super comfortably.

When did everyone else start experiencing this? I thought it didn't kick in until the third trimester!!