What advice can you offer ?
I would go.
Mindset: Slow things down, ask questions, make sure you have the issue question right and assure them you will think it through before responding (to help avoid the gang up thing).
I would go in with a big question or two. " Based on what has been developed in T and at the doctor (whatever the term is), what relationship skills can I learn or apply in order to move our marriage to a better place."
FF