I'm almost 7 weeks pregnant and my resting hr is going back down after climbing from 55 to 71. Now it's back down to 63? Normal?

OK. Do not worry, best wishes. Heart Rate can fluctuate due to so many reasons, as long you are doing well with no other symptoms, do not dwell on this. Best Wishes.
Yes. heart rate at rest is slightly higher in pregnancy than when not....but it usually is not noticed by patients. Breathing rate is also higher during pregnancy.
Normal. Resting heart rates during pregnancy can change due to the expanding volume of blood and fluids that need to be moved through the system(you) at any given time.