In need of serious help

So my husband and I have had a cat, we’ve had her for about two years now, we took her from a family members home, who couldn’t have pets where they were moving and could not financially afford anything extra. Long story short, she has been for the most part a very good cat. We also have two dogs. A yellow lab who is almost three, and a German Shepherd who turned one at the end of November. Our cat has been having some serious issues since I first got pregnant. Clawing our dogs faces while they sleep, knocking over glasses off the counter when we aren’t home and breaking them, tearing holes in the dry wall? She’s been pooping all over the house (so disgusting) and not being her self (hissing, clawing guests including my 7 year old brother and even us without anyone provoking her) I took her to the vet to see if she had something going on, and after a very expensive trip, they said there’s nothing that is going on to cause this big of a change. My only thoughts are my pregnancy. We tried living on her to let her know we love her, (after a bath) because of her pooping issue, and I’m not messing with that while pregnant. My husband cleans it up, and I disinfect like crazy. Nothing in our lives or routine has changed besides this pregnancy. We’ve been doing everything we can the last few months to figure out what’s wrong, and my husband and I have thought about finding her a new home. We have a business where we live where they foster the animals for a few days to see how they respond to a wide variety of things, and they interview potential people here that the animal could possibly be adopted by, they also keep the original owners in the loop and let them also help decide what they think is best. I don’t want to let her go, and I don’t want her to feel abandoned, but I cannot keep doing this. I don’t want her doing anything to our baby on the way, and I am just feeling defeated. I guess what I need help about is, am I a horrible person for considering a new home for her? I didn’t want to be a person to let go of my animals once I got pregnant, but she has become so mean, and is going out of her way to hurt those around her, including my dogs which I do not allow. I’m just lost and don’t know what to do 😭