This is a confusing set of symptoms. How high is your heart rate and how low is your blood pressure? A racing heart coupled with low or dropping blood pressure can be alarming because it suggests you might be bleeding.
That combination of symptoms suggests that your heart is trying to raise your blood pressure but is failing to do so, which in turn suggests that the blood is leaking out somewhere, i.e. bleeding. But a hemoglobin of 13.6 is only very mildly anemic, which suggests that not much, if any, blood has bled out.
So that's why I asked how high is your heart rate and how low is your blood pressure. Perhaps the deviations from normal are minor and you just normally run a little high on heart rate and a little low on pressure, and it's not really a problem.
In any case. I'd mention it on your next visit to your doc.