>My meter estimate

That's your biggest problem, your previous reading is an estimate, not an actual one. And it's probably a grossly wrong estimate. You need to look at previous bills and seek a correction.

>Electric Baseboard Heating

That's the most expensive possible way to heat, second only perhaps to burning collectible trading cards in a fireplace, though at the moment that almost looks competitive.

>most rooms are set to 65 and my office is set to 71.

That wouldn't be affordable for most people, even with heat pumps. Buy some sweaters and turn the heat down to 60, and that only in the spaces you actually use (for freeze protection as low as it will go without actually being off in the rest).

>I run a gaming pc all the time.

On the plus side, that's no less efficient a heating source than your electric baseboards, though come the end of heating season...