pectus question

Hello, I am currently working through the 8 steps book. I struggle to feel the effects from most things, the same situation when seeing phyios etc, I find I just don't seem to respond to anything, my physio did notice I have pectus excavatum to a minor degree, I was just wondering if anyone trained in the Gokhale method has any experience treating people with this ( a slight dip in the chest which also makes my ribs flare, maybe why I cannot seem to anchor my ribs? )
Anyway I just wondered if there is anything I need to bare in mind with this, or any exericses that might be even more important because of this.
Thanks so much in advance