Common areas in apartment during RAI treatment

Hello! Mentally preparing for my RAI treatment. I live in an apartment with my husband, baby and dog. I’m planning to have the apartment to myself for at least a week. I have a bathroom connected to my bedroom and was planning on staying in my bedroom for the whole time except when I’m getting food from the kitchen and stuff. This is because I am worried about sitting on my couch in our living room and spending a prolonged amount of time in that room because my baby spends a lot of time there. But I wanted to check and see if I am worrying over nothing? If for some reason my bodily fluid got on the couch would it dissipate after the week? Does just being in one place lead to radiation or do you need to leave bodily fluid behind? I’m so nervous about affecting my baby. Thank you!

Also while I’m here…I’m thinking of taking a Waymo back from the hospital after I get the pill…is that ok? I don’t want to drive in our shared car that the baby goes in. Or again is this worry not warranted? Tysm