Hello, You described different symptoms and I will try to go over them one by one. If low blood pressure runs in your family, then nothing to worry about it, it is your normal blood pressure. The only issue with this is that you should be careful when standing up, as standing up abruptly can cause dizziness and blacken in front of your eyes. Just do it slowly and everything will be fine. Concerning the pain in your chest which worsens with breathing; such pain is usually muscle pain, it can come from the spine. It is not dangerous but can cause quite a discomfort. You can take Ibuprofen unless you are allergic to Ibuprofen or have stomach problems. For irregular heart rhythm; if you feel it occasionally, especially as a skipped beat, then there is nothing to worry, it can happen to a healthy adult as well without any consequences. Just limit the intake of caffeine and quit smoking and excessive drinking if you used to. In case the palpitations are frequent and don t decrease after decreasing caffeine, avoiding cigarettes and alcohol, you will need to refer to a doctor and have ECG monitoring, to find out what type of heart rhythm disturbance you have. So your doctor can prescribe treatment. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Lilit Baghdasaryan, Cardiologist