Horomones are making me want to kick my animal. I sound horrible.

I would never ever hurt my cat. But yesterday my brother brought over a baby bunny he saved after his mom died. I told him he should have left him alone but it was too late. Anyways, he was in a box full of grass and i put a hamster water bottle and some leaves, tiny apple pieces, and some tiny pieces of broccoli in there. He was too little to eat any of it so i called the animal shelter and they said since we live by so many bunnies, i could let him out under the bushes and the mama bunnies would take him in. I put him out there and he followed me back so i took him back out and left before he could do that again. A few hours later my cat is meowing st the door. With my baby bunny in his mouth, just barely alive. I bawled my eyes out. This pregnancy made me so emotional over it. I sat there with this bunny for 20 minutes crying wanting it to wake up. Then after he died it turned to anger at my cat. Ugh! I hate these emotions.