Hello. Thank you for your question and welcome to HCM. I understand your concern. I can see that this is a very worrisome phenomenon to you. There are a lot of changes that happen during even one day and, of course, in the time of the month, that cause sometimes drastic fluctuations in blood pressure. During most of everyday activities, there are changes in blood pressure figures, such as caffeine-containing beverage consuming, alcohol, physical exercise, psychological factors, hormonal changes, loss of blood through menstruation, all factors that can and do cause changes in blood pressure figures. These figures, standardized to the worldwide population, are 100-139/60-89 mmHg. At this point there is nothing to worry about. Although, if this worry persists, you can run a 24-hour blood pressure monitor, which will measure your blood pressure automatically in different times a day. The figures obtained will be more precise than figures obtained when randomly measured. It also is not recommended that one measure his/her own blood pressure. Dizziness can be caused from sudden drops in blood pressure, and is almost always associated with fast and/or brisk changes in position, such as going from lying down to standing up. Therefore, I recommend you to stand up slower, and not jump from lying down to standing briskly, but assuming sitting position for 30 seconds to one minute. Sleep apnea, as long as does not lower your oxygen saturations, is not something to worry about. However, my opinion is that almost always it comes from overweight in young ages. I would recommend you a consult with a pulmonologist, and discuss the alternative of being put on a monitor during sleep, and assess the frequency and time-span of apneic episodes and whether treatment strategy should be undertaken or not. I hope I was helpful with my answer. Best wishes, Dr. Meriton