Weight & Heart Rate

I had a doctor appointment today for a physical. I've never experienced a physical this in-depth. He performed an EKG test , do I was covered in all these little electrodes on my chest, under my breast (awkward!), on my feet, arms, legs, everywhere.

Conclusion: Everything's normal. The doctor said I have a low resting heart rate, about 45-50 bpm, like an athlete! I felt pretty good being compared to an athlete :)

On to height and weight... In an earlier post I estimated my weight because I haven't stepped on a scale in quite awhile. I guessed 140-145 lbs, which was accurate. I'm 5'4" (didn't know that either) and weigh 145lbs. Sigh. I feel like I've been this weight forever! I'm having the most difficult time losing the 10-15 lbs I would like to lose. 

Why am I stuck here? I'm ready to jump off this damn plateau! I keep thinking, how much more do I need to workout? 6 or 7 days a week instead of 5? Or two WODs per day? Or how much healthier do I need to eat? What else do I cut out of my diet, when I've already eliminated so much already?

I must be overlooking something.