Be truthful with your husband and tell him you need a little time alone. I live with my husband my son and our 90 lab, in a 460 sqft cabin.

It's nearly impossible. Do you have a tub? If so, institute personal time by locking of 30-45 minutes at least 3 or 4 times a week for you to take an uninterrupted bubble bath (have your salt or sugar scrub, your bubble bath, a glass of wine, and watch a show you like on your phone as it sits safely, for you to enjoy while soaking.

*locking off

What I do is grab my phone sit in my closet and shut the door and play on my phone and no one ever bothers me cuz they can't find me lol

Like others said communicate in the most difficult way; honestly and vulnerably. I would say hey this is really hard for me to admit but I'm having a hard time with being over stimulated, I'd feel like my day to day would be a lot easier if I had time set aside for just me and minimal stimulation; can you support me in that?