Hi Mukhtar. Thanks for your query and for using Health Care Magic
You mention that your heart rate
increases during urination and some times at sleep.
There i chest pain
You are having palpitations.
There are many causes.
However it its associated with chest pain of light headedness, it needs evaluation.
The best option for you would be to under a HOLTER testing to find to whether you have any arrhythmia
If its normal, then you need not worry.
Hope this answers your query.
Thanks and Regards