Welcome back Stellar and very sorry to hear about your accident and your wife's medical issues. I just went through a major heart/health scare with my mother who spent a couple weeks in the hospital so I can somewhat relate to the feelings of helplessness/fear associated.
Of course the best thing you can do to help is to be sober for yourself and her in this time. Forgiving yourself will come in time but quitting drinking is the very highest priority item you need to attend to now. Can you call your sponsor or someone else in your home group to see if they could pick you up for a ride to a meeting? I'm sure they will be happy to help and are wondering where you've been.
You can always reach out here too, any time of the day or night.