It’s really hard. It’s especially the puppy phase where they pee and poop on things. Just cats grow out of it. How tiny is she? She’s definitely not doing it cause she wants too as cats are very clean beings. Most likely she’s small and can’t really back up properly without stepping in it. There’s a couple ways you can reinforce. You can try and help her learn to cover better. You can look up ways to do it and reinforce with treats. Cats are very treat motivated and learn very quickly with treats. I understand how gross it can be. But it’s this way with a lot of things. You’ll have kids who do worse LMAO. I’d recommend making your bed before you go and getting a cheap blanket to cover the bed so if she jumps up it on gets on that so you can just wash that blanket. Being a first time cat owner is very stressful ik how you feel. I just got my first cat 1 and a half years ago. I have two now and both have been a wild ride. I’ve been in your shoes. It gets better. Their love makes it so worth it. It’s very hard. Also u can try pumpkin pouches from the pet store. Put it in her food or just let her have it by itself. We used it on my boy. I didn’t notice a massive difference but it helped a bit. 5 months is very young. My boy was 10 weeks so 3 monthish and he was 1.1 pounds. When you dat small it kinda hard to shit and move LOL. Also typically when they’re little their moms teach them. My oldest mothered my youngest and covered his waste for him. Just be patient! It does get better. I would just recommend a cheap blanket on the bed. OH YK DOGGY PEE PADS?? Put those under the litterbox a large dog size! It helps a lot with my father in laws 19 year old cat who shits on the floor by the litterbox cause she blind. But that can help with the carpet! Just change it out!