Increased boob leaking

My boobs are very leaky usually, but today they're out of control!  The slightest pressure makes them leak, and it's actually yellowish white now instead of clearish like normal.  I get a good amount of it too if I really apply consistant pressure, but I get moisure spots probably every half hour even without pressing on them.  I'm shocked by the sudden increase of volume and thicker consistancy.

I know it's probably not a sure indicator of labor coming soon, but I can't help but be suspicious.  Anyone else experience this or heard anything about it?  I'd love to get excited about it, but I'm trying not to until I actually start to have contractions.