Cleanliness/PTSD

Hey everyone I could really use some help/advice here since I am feeling really anxious right now. I recently made a new friend and have gone to her house a couple times, and have discovered that she and her husband have no filter in terms of cleanliness or having guests over. They leave food on the floor, leave cat poop on the floor/unclean litter box, dirty dishes in sink, etc. This is actually stressing me out immensely since I never expirenced something like this before and don't really know how to cope with it. Additionally, the husband doesnt have a filter for anything and says the strangest things and argues with his wife in front of me many times. I have PTSD with yelling/loud noises and this is triggering me and tonight was the last straw when I went over to hangout and wash a load of laundry (since I don't have a washer) and found a cat turd in my wet clothes and their dog pooped in the house. I did not say anything about being uncomfortable and politely left. I came to the realization in the ride home that I need to have my friend come visit me outside of her home if I am to continue this friendship and this is for my mental health. I have really no idea how to approach this with my friend and she is a good person and I want to be her friend, but my mental health comes first and I have no idea how to proceed