Is An Episode Of Forgetfulness A Cause For Concern?

Question: Hello, I am a female 69 years old who exercises regularly doing pretty strenuous cardio and weights 4-5 times per week. I eat pretty healthy and am 5'6" tall and weight 130. I have successfully treated hypertension and use Biotin and Vitamin D along with Chlorthalidone 25mg qd. I feel healthy but occasionally have what my internist thinks are migraines with a dull ache and large, ocular spots which only last 15-20 minutes if I rest. I have had these infrequently (3 -4 per year). This morning I had a period of forgetfulness in which my husband said I asked him to take my blood pressure. I do not remember that situation involving the B/P at all.....it was normal though. My awareness was simply that I was having problems thinking. My husband says I made perfects sense during that period and showed no symptoms of a stroke or ascemic event. It all lasted a short period and I went on to my volunteer job at school and feel fine but tired now. We just got home from some work and play in XXXXXXX being gone a month. What do you think? Should I pursue this?

Thanks. My husband is a nephrologist and says the same thing. He is concerned but thinks a lot of tests are unnecessary at at this time. Thank you