To answer your question, none of these activities poses a risk for HIV and thus there is no need to get tested.
I would like to comment, though, that it seems like you are letting yourself be ruled by fear. While HIV is a scary virus, it is 100% preventable and is not as easy to transmit as many people fear.
Each person has their own unique boundaries and limits of what they like and what they are interested in and what they will or will not do sexually. When those boundaries are determined rationally and deliberately, they are the one of the most important parts of a healthy and integrated sex life; when they are reflexes determined solely by fear, however, they are unhealthy.
One way to determine healthy boundaries is to educate yourself on what is and is not risky for disease. Oral sex, for example, is an extremely low risk activity (common sense, of course applies - don't perform oral sex if you have a cut or open sore in your mouth, for example). Stimulation of the anus with a finger is safe. Anal intercourse is dangerous only if a condom is not used or if a condom is used incorrectly. Mutual masturbation, however, is another perfectly safe activity.
You have no need to conftinue worrying about the activities you have described because they are not risky or causes for alarm. I hope that you can allow yourself to decide whether you enjoy these activities or not based on their own merits, and not based on your fears of HIV.
Good luck,
Dan