In some cultures in the Northern Hemisphere, the astronomical March equinox (varying between 19 and 21 March) is taken to mark the first day of spring, and the Northern solstice (around 21 June) is taken as the first day of summer. In other traditions, the equinox is taken as mid-spring.
Circulation problems that cause dizziness. You may feel dizzy, faint or off balance if your heart isn't pumping enough blood to your brain. Causes include: 1  Drop in blood pressure.
When stress starts to impact your physical health and well being, it is important to make adjustments. A physical exam would give you some guidance, and also tell you if there is another underlying cause for your symptoms-- especially that fast heart rate that you are mentioning. Many things can make you feel dizzy. Low blood pressure, high or low blood sugar, changes to your inner ear, imbalances in your electrolytes in your body, heart problems, thyroid abnormalities, and a host of other issues can all result in dizziness.