Cat won’t go in litter box?

*Update* thank you to everyone that commented. I was hoping I wouldn’t have to take her to the vet because I don’t have anymore off time available at work. But luckily my AMAZING mother-in-law is going to take her for me.

I’m not sure if I should post this here, don’t jump me. But I believe my animals are apart of my family and I’m hoping someone on here is familiar with cats, so I’m going to. My cat, who we have had for a little over year won’t go in her litter box ever since she got outside. She got lost outside for a few days after she somehow got out. Thankfully she was okay and we found her, but ever since then she will NOT go in her litter box. I keep finding her peeing in the bathtub and pooping in corners. If we shut the bathroom doors, she waits tell we open it and runs in and pees in the bathtub. We are making sure that the litter box is clean, tried moving the litter box to a more noticeable areas, we tried tapping her on the nose when she goes outside of it and placing her in the litter box, and we’ve tried to buy different kinds of litter but nothing seems to work or help. I’m not sure what to do, cat pee and poop smells so bad and I feel like my house just stinks horribly. I’m tired off bleaching the tub and cleaning my carpets. I don’t understand why she’s doing it, maybe she’s mad and wants outside? She seems perfectly fine and acts normal other than this. No one I’ve asked about it knows what to do.