I love my animals. Caring for them and spending time handling them, watching them, etc... is a huge stress relief for me. As a recovering alcoholic and drug addict it is important for me to keep myself busy. Idle hands don't work well for me. Luckily, my passion for animals was reignited a few years ago after I had a few years of clean/sober time. For me, my animals can be seen as "therapeutic" I suppose. That being said, if I truly felt that I was in need of an Emotional Support Animal that would have been established long ago.
The way the OP went about this seems like an underhanded, deceitful, unethical abuse of a great system that is truly there to help people actually in need. Deciding to go get a Dr note because the living situation changed seems just plain wrong to me. It's like going to the food bank and taking food from the poor because your grocery store stopped carrying your favorite cookies.