Gas leaks are very dangerous. For safety gas leak detection should not be delayed. If you can smell even the faint smell of gas or your gas bill seems too high, it is possible that you have a leak.
To check for yourself, turn off all the appliances in your house that use gas, including those with a pilot. Find your gas meter and take a reading before you go to bed and then again in the morning before you use any gas appliance. If the reading has changed you may have a leak and should call us to investigate further, and repair as required.