You are a bit overweight
- that has no relation to your present complaint...
Also it may not be related to your blood pressure - you say it is well controlled...
Heaviness lasting a day and causing sleep disturbance suggests a different reason - there are no clues in what you have written. You ought to see a neurologist
for proper assessment assistance. If it is not relieved, you may need MRI
or CT scan
for further evaluation
You can use simple over the counter pain reliever - like paracetamol
- in the meanwhile