Condoms are sufficient to protect against HIV infection.
Oral sex is not a risk.
HIV is not transmitted through inanimate objects.
See a dermatologist for pimples / boils, they have no relation to HIV. Anxiety can cause your mouth to dry up subsequently causing oral ulcers, drink adequate amount of water through out the day and refrain from eating spicy food, you're going to be fine.
You don't need to test, if you are unable to think rationally see a therapist.
Nothing you describe is a risk for HIV. HIV is transmitted by unprotected vaginal or anal sex or sharing IV drug needles. Saliva and air inactivate the virus.