Wife suggested I might have postpartum depression and I laughed

We just had our second kid 3 months ago and honestly I've been pretty checked out. Not sleeping great even when the baby sleeps, zero interest in stuff I used to love, just going through the motions at work. Wife brought it up gently and I was like "that's not a guy thing" but then I googled it and... yeah. Has anyone dealt with this? Feels weird to admit I might be struggling when she's the one doing all the feeding.