Vibrators and pregnancy

So I have a heavy duty body massager as a vibrator. It's just a clit one. I'm afraid to use it because it's so strong I don't want to give baby like shaken baby syndrome or something. But unfortunately my husband's sex drive is geared more towards porn then sex so my vibrators is pretty much all I have! Could it hurt the baby!? I know they say they don't but this is sort of a heavy duty sucker.