Dear Kira,
Could it be that the oversupply/fast let down have really taken off now 
that the baby can actually suck? Clicking can be a sign of a fast let 
down. See if the it gets worse when the flow is fast and better as the 
flow slows down. This would also explain the spit up. Maybe the baby is 
pinching off the nipple to slow the flow on one side? Making sure the 
baby is in a very stable position with their chin off of their chest so 
they can swallow easily might help if this is the issue.
Just an idea that came to my mind...
Let us know what happens!
Warmly,

-- 

Barbara Robertson, MA, IBCLC, RLC
The Breastfeeding Center of Ann Arbor
bfcaa.com

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