enie

It sounds like from reading your posts that whatever your Doctor tells you is probably your best advice.
I can only share with you my own thoughts, which are not very medically oriented:
Your lack of circulation in the morning could be from either a sleeping habit or disorder; although, my Father complained of the same symptoms for way over 20 years and only lived to be 92. He said he found relief by wearing socks, long-johns, and long-sleeved tee-shirt every night, and drinking milk and eating lots of green veggies (as he called them) for his leg cramps.
I think that feeling your own heartbeat is relatively common. I have been able to hear my heartbeat since I was a small child. At the Doctor’s office when I was little I would tell the nurse that she didn't have to take my pulse, I could just tell her.

Honestly, I feel that whether our Doctors have diagnosed us with a serious heart condition or not; if we spend our days thinking about others, and keep ourselves as busy as possible helping others, we wouldn't dwell so much on whether we can feel our own heartbeat or not.
It's kind-a like growing a garden in a desert place. The plants that get the most water become the strongest. When we are always thinking of ourselves and dwelling on the problems within our own body, just like a weed, those negative thoughts are going to keep multiplying and growing in our mind. But, when we set our heart on thinking of others and how we might help them, those thoughts will grow, too. So, the more love and consideration that we give to others the more beautiful fruit that we will have. And that in turn will bring joy and health to our lives, instead of the choking weeds of worrying.
Hang in there, and God bless,
enie