I made a huge mistake adopting and I need to return to rescue

I made a massive mistake adopting a dog. I have extremely high anxiety. I love dogs and always wanted one but after getting one it’s made me so much more anxious to make sure she is healthy. Making sure she eats enough and uses the bathroom enough. It’s keeping me up at night. Also I adopted from out of state so I can’t just walk in and talk. I put in a request to surrender but idk when they will let me come in. It’s mandated by the rescue that I return to them specifically. But I want to just drive in later this week and see if they can do something. I’m really not mentally fit for this. And I’m not taking good care of her.