Welcome back. Hopefully things will be smoother as time progresses. It's great that you are going to a support group, and while you had fun your spouse didn't. So I have to ask - Do you know why your spouse was "terrified". Understanding your spouses feelings is a good place to build on. Peronally I found that many support groupes are geared more towards the trans person and not their partners, significant others, spouses, etc...
It is so very hard for a spouse to understand the why's and wherefores when it come to trans people. If you are lucky like me, you and your spouse can work it out, but you have to be honest and up front. My wife and I discussed everything from what my intentions were (becoming Stephanie, a woman) HRT, coming out, what her desires are, her plans, her needs etc... We even discussed separating and getting a divorce, very difficult things to discuss but it's the hard things like this that you have to discuss. May be therapy for you both may be the best, but then you discover the dilema of finding a therapist.
Just remember no matter how bad things may seem, none of it is life threatening. There is always a solution., sometimes it takes a little comprimise.
Welcome back, get your spouse to login here, there are lots of people here to chat with and get advice.
Just my thoughts