New landlords have a no pet clause..however, the old landlords allowed pets.. I am disabled...what can i do...very upset

Make sure you are using the proper terminology because there are strong legal ramifications. Service Animals are governed by the ADA, are usually for people with physical disabilities, and have huge protections. Animals for anxiety and depression are Emotional Support Animals. These are NOT service animals. Emotional Support Animals are not governed by the ADA, but rather by the Fair Housing Act. They do not enjoy anywhere near the level of protection that a Service Animal enjoys. With limitations, landlords have to allow them with some restrictions if you have the appropriate paperwork, but ESAs can be denied entry by businesses and in any other context other than housing. ESA is a very new area, and I've seen seasoned Animal Law and Disability attorneys disagree on these boards on the issue. That is why I suggest going to the source--contact the FHA office directly and see what paperwork you need to designate it as an ESA (to make sure your papers are in order) and ask them what your rights are under the FHA. If you truly have a Service Animal, then the landlord can not do this.