Overcharging problem - iPhone not turning on

Hello,

I have an iPhone 5s, (last update)

I always plug in my iPhone to my iMac to charge the battery overnight before I go to sleep.I did that many times and I've never had a problem.

This morning after I woke up, I found my iPhone kind of hot (Probably because of charging) and not working. I tried to turn it on, pressing POWER and HOME buttons in the same time, re-connected to my iMac, re-charge it by using the outlet, using a new cable to charge it, and non of them work with me.

Could it be overcharging battery problem, if yes? what should I do to fix it.

There is no Apple Store in my country so I am not able to take my iPhone to them 😟