Same happened with me as well. Life was PTSD was actual hell for me. From loving college to throwing practically off everything away became a reality for me. I was terrified and nothing was working out.
But, my dog held my back, made me feel loved, resulting in transforming my medical condition and helping me live a fuller and happier life. You can definitely go for an emotional support dog. But, for that, you will need an emotional support dog registration. Ask your therapist for more information.