Experiencing side effects from propranolol - anyone else?

Hi everyone, I recently started taking propranolol for anxiety about a week ago, and I'm a bit concerned about some side effects I've been experiencing. My appetite has decreased, I'm feeling extremely tired, and most worryingly, I've noticed my stools have become very dark. Has anyone else dealt with these kinds of side effects from propranolol, especially the dark stools? Did they improve over time or after stopping the medication? I'd really appreciate hearing others' experiences. I'm trying not to worry too much, but it's hard not to when you notice such changes. Thanks in advance for any insights! - Angel