I have a totally hairy belly too.
But my midwife told me under no circumstances should I shave it, as they hair will fall out towards the end/at the end of pregnancy.
She said if you shave it'll just keep growing back, because after months of "fighting" the hair, your follicles will become trained to keep growing it, even after bubs is born.
So I'm leaving it.
If it doesn't fall out I'll look into waxing