I'm really worried because I've been feeling breathless for the past two days and I've noticed swelling in my right leg and hand. I've been taking Dytor 40mg every day, but it doesn't seem to be helping. Could this be something serious? What should I do next?

It sounds like you might be experiencing fluid retention, which could be related to heart or kidney function. Since you're on Dytor without improvement, it's important to follow up with a doctor urgently for a thorough evaluation, including heart and kidney function tests, to determine the cause of your symptoms.