### Patient: Doctor, I have been feeling really tired and my heart beats irregularly. Additionally, I've been having headaches and it hurts to breathe sometimes. I've also noticed that my heart rate seems to have increased.
### Doctor: It seems like you might be experiencing orthostatic hypotension, which is a drop in blood pressure that occurs when standing up too quickly. It can cause symptoms such as fatigue, irregular heartbeat, headaches, and shortness of breath. We'll need to do some tests to confirm the diagnosis and develop a treatment plan for you.