Call her, reassure her (when possible) that you’re okay. When you leave to go to work, call/text her. When you get there, do the same. And then when you leave and get home. Even if it’s just a, “Hey Mom, I’m home from work” type deal, she’ll appreciate it. Also, maybe just for the sake of doing so (and it’s honestly just a good idea) get one of those mini-mace cans that goes on your keychain.