Today as I was having a follow up for lung cancer treatment my blood pressure was 85 over 48. Could this be caused by stress? I have been under a lot of stress lately, my husband having his leg amputated and is currently in rehab, my 47 year old daughter suffered a major stroke 3 weeks ago, and then the concern of how successful the treatments for my cancer had been. Thankfully my news was great. I have been having some short spells (1 to 2 min. duration) of dizziness, blurred vision, lightheadedness.