You should definitely, go to a different doctor. Possibly a high rated OBGYN in your local area or one that you can at least get to. Or even someone who is educated on stds.
It's my understanding that papules in the vagina can absolutely be benign and of no concern. Whether they are new or not, this is likely the case for you. I say this in a way that I hope it is taken as I intend, but do you think that perhaps anxiety and stress could be playing a role in why you don't 'feel right"? I am really happy you are seeing a psychologist and suspect the same thing. The event was traumatic, clearly, and understandably so. And now it is impacting you in ways through the stress and anxiety. I would keep working with your psychologist to help understand this aspect to the assault and why you are having physical things you A. notice (which we do when we hyper focus) and B. that show up due to anxiety and worry. You've done due diligence in checking things out but had you found these before, you'd key into the numerous websites that state clearly that they are most typically nothing at all to worry about. I feel for you and am sorry this all happened.
HPV is not uncommon but it is unfortunate that you have it. Luckily, today's children are vaccinated against it. I guess the itching is your main concern? Have you been swabbed lately for yeast? That also can cause irritation and things as they heal in the genital area can itch. The papules perhaps were also there and you just never had done so much analysis of your genitals before. A doctor has examined them and is not concerned?