Upon waking the HR should be an accurate reading for the HR at rest. You don't state the morning calculation, but if it is consistently over 100 there is a problem. A spasm is more at random times than consistently every mornining.
Sounds like "flutters." You should take your pulse and also time how long you have these flutters. Since they probably stopped by the time you see the doctor it will help the doctor with his diagnosis. When I started to have flutters, I actually kept a log to show the doctor. He probably will put you on beta blockers to slow the heart down.
It could be stress. I get a fast heart rate upon awakening sometimes and I've noticed that it happens when I awake from a dream or when I have something on my mind.
Then there're the other mornings when I wake up with a nice and slow heart rate and these are the times I feel most relaxed.
Sometimes my heart beat is high upon waking, and even though I usually don't remember my dreams, I can feel it's because I was dreaming... I feel "stressy"... Usually I feel calmer after 5 minutes, and my heart beat is slower too.
I was glad to read someone else has a fast heart rate upon waking of a morning. I have been on a beta blocker since I was 26 years old. I am now 36. What I do that helps me more than anything is I set my clock 30 minutes prior to having to get up and then I have another clock that wakes me up TO GET UP. I take my medicine with the first alarm and by the time the other one goes off the med is in my system and no heart racing. I have tachycardia. Not the serious kind or so I was told then. But my 'resting' heart rate was 120 then. Now it's 70. Hope that helps you some. I know the anxiety your feeling from it (which can make it worse too)
I read on a heart forum answered by Cleveland Clinic cardios that it is normal to have a higher rate in the morning. It is the getting up and getting started. I am on meds to slow my heart rate down and I can still be at 120 bpm in the morning. I have IST and my highest rate was 170 bpm, other types of tachycardia can get higher, but that is near my maximum anyway. If you're just having it in the morning I'm not sure it's too much to be concerned with, if you think you're having it throughout the day why not ask for a holter monitor? Sometimes it's nice to get checked out to get some peace of mind.