Normal Heart Rate..

My resting heart rate is usually high 90's to low 100's, which I am overweight and expect... but in the last couple days my resting heart rate has dropped around the 80's. I'm not worried that my heart isn't beating fast enough, I know resting heart rate is between 60-100 but is it normal for my resting heart rate to drop so much in that little of time?

[Jerry_NJ]

In general I'd take the lower HR as good news.  

I think you should take a "casual" watch on how you feel:  any dizziness, fainting, shortness of breath, headaches... any signs of a shortage of oxygen.  If that occurs I think you should consult a doctor.   Otherwise, bring it up the next time you have a reason to see you primary care doctor.  That's how I see. it.

I also see a rest HR of 100+ as problematic and believe that should be checked by a doctor.