Winston - Please go with your wife to the Bible Studies and Meetings. I'm on meds and I get depressed when I leave the KH or a Bible Study AND I'm not even a JW! I can't even imagine her emotional turmoil with the cong., elders meeting, the Watchtower reading she may have forgotten to do and oh by the way since her husband no longer believes she'll be in Paradise alone.... (Please note the s arcasm here) Anyhow the point is you don't know what 'they're' saying without you there and even though you question the Dates, if you don't attend that will give them more reason to 'talk'.
I've read all the posts and completely agree the two of you need to see someone (not recommended by a JW friend) immediately. Medication is not a cure all, but it does even out the high's and low's and helps you to think a bit more clear. I've been on & off for 5 years now and am on EffexorXR. I started with St. Johns Wort (and self medicated with wine & beer) went to Prozac and settled for Effexor after the baby. The Dr.'s aren't going to 'fix' the problems, they just equipt you with the tools to do it yourself. You and your wife are in for a long and bumpy ride, we're all just back seat drivers.
You're doing a great job!