Coming into season is a good consideration.
Also at around this age dogs can go through a second fear stage, where things that were ok are suddenly scary again.
She is also approaching adolescence, and so getting ready to push the boundaries a bit!!!
It may help to use a houseline to control her when greeting visitors, so you don't have to physically restrain her...
And try gradually building up to washing paws.... wash one, and then give a treat.... if you have a spare person, use a tube of primula to distract her (and get her to associate paws being washed with good things!).
My dog, Honey, is very independent, and not one for huge amounts of fuss... it took us a long time to get her to accept being towel dried, groomed etc.... but we never actually restrained her to do it... I would be armed with treats, in a room where it didn't matter if she got paw prints everywhere, and would wait for her to choose to come to me.... the reward, a bit of drying, more rewards... I also used her "wait" command a lot - put a treat on the floor, asked her to wait, did some drying and then release - this meant her focus was on the treat, not on what I was doing!!!
What do you do when she barks at guests?
Again, this is something Honey can do - she is generally fine with female visitors, but she really doesn't trust unfamiliar men... we're not sure why, but we just get them to sit still and ignore her, and she will come around in her own time...