Have been very tired. dizzy sometimes. could low blood pressure possibly the problem? 100/60.

Follow BP closely. : Dizziness can certainly be cause by low bp. The best thing to do is to monitor your BP twice daily and this give a better impression of your BP range. I would take this record to your doctor.

Yes: But this depends upon what your blood pressure usually is and how much of a change this represents. If this is a change and you are feeling poorly, strongly suggest you see a pcp and get evaluated quickly. Do not wait on this. Good luck.