Don't go.
You are not being true to yourself - you are going to give yourself another mental illness.
I've been known TTATT for less than 6 months, Im now inactive and down to one meeting a month, and really it's when I want to go for my own reasons. My husband is still in, he's disappointed but not pressuring me, in fact when I do go he says 'why do you go if you don't really agree with it?' - we've agreed that he won't report about me to the elders, but they did come to see me and I told them I was doubting and confused, they aren't pressuring me, I have family issues too so people think that is partly the reason I'm not attending. My daughter is still going but she got really upset with me when I was attending because she said 'I can see you're heart's not in it and you don't want to be there, so I don't want you to do it for me', shes actually happier if I don't fake it, it is also giving her 'permission' to miss more meetings whilst she figures things out for herself.
You seem to have the perfect excuse if they already consider you are unwell. Can't you tell your wife that you don't feel able to keep up with the jw demands at the moment, that you are not sure about some things and would rather keep your relationship with J personal at home? She might be upset, might even yell and scream but that won't last forever. Then your free, more time for yourself to do research, heal, find different interests, whatever.... no more faking and less internal pressure. You can always offer to support her in any way you can manage (with rides if needed or even go to assemblies if that will be the most difficult for her) but it sounds like its time to be honest for your own well-being.