Dairy free living is a hard road. Making stuff from scratch is just how you have to roll, unfortunately. Puff pastry is dairy free (although there's palm oil in most) and I think it's Nanna's brand of apple pies? One of them, anyway. Black and Gold cake mixes are dairy free, as well as some of the Green's varieties, but not all, so check. Chocolate and strawberry ice cream toppings are good. Oreos and McVities Digestives biscuits, as well as *I think* the pink ones with sprinkles.
Good luck at the Drs!