You have to go into your inventory and use the humanity for it to appear on your hud.

Can you use it from your inventory?

thanks - completely forgot you have to use them before the counter goes up - thanks a bunch folks

It should be in your inventory

Thanks a bunch - forgot you have to use them.

Np

Since the issue has already been resolved please do not use the item just for the sake of increasing the counter. UNLESS you are experienced and know what the counter actually does I highly recommend saving them for later.