She's fine, PiP, just letting you know she is NOT happy with you, this happens to us every time one of the gang go into the vets or cat prison (cattery), last time maybe she thought it was just a one off, so forgave you immediately, but now you've done it to her a second time, well, the gloves are off and she's letting you know in no uncertain terms that this sort of behaviour will not go without complaint.
Let her out, get back to her old routine, spoil her rotten and giver her all she wants for now.
My oldest and clingiest boy ALWAYS gives me one good bite when we've been on holiday, once that's out of the way he's happy to get back to normal and won't bite me again until next time. This is his thing, he does it every year (he's now 14!). Your cat will be fine, just allow her to get it out of her system in her own way.