I just posted on another question similiar to this.
As Ellie said, if it continues, you should look further into of course but I will tell you what my Dr has said about low B/P. (If you look, I posted not too long ago too).
I was frantic because I took my B/P and both times in 2 days it was low! One time it was 100/45. I was thinking, its not good.
Long story short.....I spoke to my PC, my Endo, my sons pediatrician and a heart Dr too. (I really thought it was just too low. In any event, they ALL told me the same thing. It is actually better to be low. If you DO NOT have any dizziness or symptoms of real lathargic....dont worry. They told me it fluctuates all day. I think the hypo and hyper Symptoms have a BIG part as when I was hyperSymptamatic a month or so ago my B/P was 130/80.
I hear a few people say that hypo can lower your B/P.
I just wanted to share with you what I was told by numerous Dr's because it was only 2 weeks ago that I posted & I was really concerned too!
I hope that elliviates some of your worry.
I can only share whats been told to me......