I agree with Delphmoon (so sorry if I got your name wrong)
Heartrates are supposed to sit between 60 - 100 beats per minute. However it is quite common to have a higher resting heartrate than the norm. As each of us are individuals these numbers are used only as a guideline until you can find what your individual resting HR is. You might be one of these people who's HR is a little higher. During pregnancy our heartrates are elevated anyway because of the extra blood flow throughout our body.
Although feeling the way your feeling, I would go back to doc and ask him to do another set of bloods for you Hb levels (haemoglobin). Also whats your blood pressure like?? High / low?? It may also be an idea to get him to do a gestational diabetes test too to rule that out - Symptoms include low blood pressure, light headedness, and a higher HR. I dont mean to stress you out, these are just things that maybe he can rule out. Good luck in your journey - and have confidence in your team of docs and midwives. Your in the best hands!! xx