How can I stop my dog from urinating in house due to separation anxiety?

My dog is brittany from the shelter. We’ve had her for two years, she is about 6 years old. She has separation anxiety and is on a mild medication for it. Recently (seemingly out-of-the-blue) she’s been peeing in the house EVERY day when we are at work. She never used to that. Checked with the vet and it isn’t health related. We think it has to do with her separation anxiety. She always pees on a blanket that we’ve left for her, rather than the carpet. I could take the blanket away, but then I’m afraid she’d just pee on the carpet! We’ve tried kennel training (a very slow and steady process), but she’s broken out of every kennel we’ve tried or hurt her paws trying to get out. I’ve look into Doggie Daycare, but it is too expensive for me. I love her, but I’m at my wits’ end! Any words of advice at helpful!

haven’t you a fenced yard i thought shelter dogs could only go to a home that has a fully fenced yard is it not dogproof can’t she be in the yard while no one home like other dogs do sorry if ive missed something or there is no fences there and that is a problem.