You need to touch bases with some close friends and try use them to distract you. It's hard to get up initially, but it does get easier. You need to motivate yourself to do something. I'd suggest going for coffee with friends, going shopping, tending to the animals.
If nothing else, hold on to the reality that your animals need you. You are holding things together for the sake of the animals.
Can your pdoc help you to change your meds slowly as an outpatient?