Seriously horrible smell

Hey ladies so I moved in with my sister yesterday until the house that we will be buying is being worked on. However.. she owns a TON of animals in her apartment. I mean she has everything. Multiple guinea pig, mice, rats, tarantula, snakes, fish, dogs, cats, lizards, bearded dragons, the list goes on. This apartment is covered in cages. The dogs don't use the bathroom outside, they are pee pad trained and the pad is right outside of the room door that I sleep in. The smell of this house is HORRID. The carpets smell like they are soaked in pee. Like literally someone dumped piss everywhere. It's so bad I spent the entire night last night gagging and nearly vomited everywhere. I slept underneath my blankets dying of heat just to block out the smell as much I could. I didn't sleep til 230-3am and i woke at 425 gagging again. I'm seriously concerned about the smell and being 29 weeks and 4 days (maybe 5, I forget which day I'm on now). But I literally have no other option. My SO's parents house is currently infested with bed bugs due to his brother bringing them home from another family members home and they haven't had enough money to get it treated, my other sisters apartment is 100% full of people and I'd have no where to stay, my grandmother lives in an elder residence studio apartment and those are the only people I know. I'm just worried that the smell can be harmful for my baby and I.