There are no risks from handjobs or fingering. There is no risk here.
1. if an infection does so ever happen from me fingering her and her rubbing my penis could it show up on my throat?
You didn't finger her and then touch your penis - you said that. This is your anxiety talking. Even if this did happen, this is not a risk. Hands do not transmit STDs, and if you got an genital infection, it would cause genital symptoms, not throat symptoms.
2. i have been extremely anxious and depressed over this could any of this cause my symptoms.
Anxiety and depression can cause actual physical symptoms. A sore throat? I don't know.
Cobblestone throat, if that's what you have, is usually caused by post-nasal drip (allergies, cold or dry air, etc.) or reflux. It's not an infectious process unless you have a respiratory infection, like a cold or sinus infection. No STD causes any of these symptoms. https://www.healthline.com/health/cobblestone-throat
Are you getting treatment for your anxiety and depression? That's really important. Your mental health is just as important as your physical health.
Thank you for the reply. Can you explain why hands do not transmit STD? I also forgot to mention that I also experienced a cracked corner of my lip and an itchy upper lip this is unrelated to my existing symptoms?