You might have to groom him more often if hes a big shedder. Is he neutered? If not, that will definitely help out with the abnormal pooping areas. If he is neutered, pooping where he shouldnt could be a sign of stress or territory. If hes still eating, drinking, and acting normal i wouldnt worry too much. It sounds like the hair could be causing him an upset tummy. I would start by grooming him more often and monitoring his poops and where hes pooping. If its still abnormal after a week or so of more grooming, i would take him to the vet just in case. A lot of rabbits dont show signs of being sick when they are actually sick
I wanted to add too that i have anxiety as well! We trained one of my bunnies to become my emotional support animal and got him certified a few months ago so now i can take him around with me in public. Its very nice having him around, and the training we did helped us get a lot closer. Now when im anxious around the house, he runs up to me and pokes me until i pet him. While out in public, he sits in a bunny sized purse with ice packs, hay, and greens, and if im nervous he will poke me so i pet him. It helps a lot more than it might sound. Hes also being trained to wake me up if i faint due to panic. If you have any questions or want to look into possibly training one of your babies, let me know. Id love to help if i can 