@nqyringmind,
The first thing you need to do is compare actual usage (KWH) to previous usage to determine if this is just a billing ($$$) variance, or if it's an actual usage variance.
If it's billing, then call the company and find out why they are charging you that much more for the same usage.
If it's usage, then you need to do what Fresco said and start watching the meter from a zero-appliance/usage condition (to see what your base usage is), and then start adding appliances one by one and checking the meter to see where it's spiking.