So I need a brain MRI (40min approx) and I have GAD and am scared of small spaces. I was told that I might get a one off prescription of Lorazepam 1mg and that I can't drive after and someone else will have to come with me and do the driving. 

The thing is I don't drive and neither does my husband. Am I actually going to be so put of it I'd need supervision and a taxi ride home? It doesn't seem like such a massive dose so I'm wondering if I can just get a train home by myself. 

Any thoughts? Also any MRI reassurance would be amazing 🤢