Hi everyone, for the past 5-6 days my body has felt heavy when I walk, and my head feels heavy even while sitting. My muscles don't actually feel weak, I am able to lift things just as fine as I was before and all that, just my body feels HEAVY. 
It feels like there are weights attached to all my limbs and I'm being weighed down to the ground and it's really freaking me out.
I think maybe it is from lack of sleep? For over a week now I haven't been able to sleep well at all.. The first few days i suddenly was not able to sleep at all.. now I am only sleeping like 2 hours a night and it doesn't feel restful at all.. I mostly just lay there trying to sleep but sleep never comes.. it feels like my brain refuses to shut off and makes me anxious because then I think something is wrong with my brain but I know my brain is fine since I've never had issues before.. 
I went to the doctor and they told me that it's just my anxiety and stress and that I need to eat more and sleep..
They checked my heart, it's fine. I haven't had any chest pains or anything so no it isn't heart related.. They also did a blood test and everything came back normal, including my thyroid, which i've read that hyperthyroidism is a cause of heavy feeling but since my thyroid is normal, it isn't that.. My blood pressure was excellent as well and I haven't had any fevers or anything..
Does anyone have any similar experiences with anxiety causing this?? How do I fix this? And how do I get some sleep?? I've tried everything but sleep just won't come and it's making me even worse.. Sleep should be easy but suddenly it's so difficult for me..