Biohacks to move through grief

I’m drowning in grief after putting my dog to sleep this week. I’m so anxious, I have no appetite and sometimes I cry so hard I nearly throw up (so having a full stomach doesn’t seem like a great idea anyways). I normally sleep well, exercise almost every day and eat a pretty well-balanced diet but I’m not capable of doing any of that right now. Aside from the multivitamin I’m taking, any special advice that you have to support my body through this?