Help..!

I'm 17 weeks pregnant and in the beginning my boyfriends child hood cat, was okay with me she had fleas because she likes to go outside and they were awful, i'm not sure if it was because of that but she's 14 years old and she's jealous of me or the scent i started giving off because if i walk around her or if she was in my way and i needed to walk by she would hiss repeatedly and i try to stay out of her way but it's starting to get annoying, i live with my boyfriend and his parents until i get a room situated at my dads because there's no bed and i'm not comfortable sleeping on an air mattress