What Causes Reduced Blood Pressure Along With Skipping Of Heart Beat And Dizzy Spells?

I generally have very low blood pressure. However, recently I have had some moments when I realize my breath isn t consistent, i become light headed, and slightly faint. I can feel a skip in my heart/chest. I then force an intake of air and try to recover. It s feels a little dizzy at moments. Sometimes fine one day and then lightheaded the next day. I don t have any other pain or discomfort. I ve also gained weight recently (30lbs). If I lay down I notice this as equally as sitting up. Sometimes eating more salt seems to help - by increasing my blood pressure i believe. I worry I ll stop breathing if I become too relaxed at times. My father has sleep apnea and breathes from a machine at night. Wondering if this is related...