Your situation involves personal contact with an object in air ( razor, someone's body, mouth, penis, lips etc. which is not a risk for hiv.) No worries, because you can't get hiv from personal contact except unprotected penetrating vaginal or anal, neither of which you did and you didn't share hollow needles to inject with which is the only other way to acquire hiv. Analysis of large numbers of infected people over the 40 years of hiv history has proven that people don't get hiv in the way you are worried is a risk.
HIV is a fragile virus in air or saliva and is effectively instantly dead in either air or saliva so the worst that could happen is dead virus rubbed you, and obviously anything which is dead cannot live again so you are good. Blood and cuts would not be relevant in your situation since the hiv has become effectively dead, so you don't have to worry about them to be sure that you are safe.
Whoever told you oral is low risk uses theoretical guidelines that have never manifested in 40 years of hiv history - and won't happen in the next 40 of your life either. It is unhealthy to spend your life worrying about a disease that is hard to catch that you haven't even been exposed to, so I suggest therapy instead of dwelling about this alone any more.
All of the activities you mention are risks for Covid however, and some are 100% guaranteed for you to catch it if the other person is positive, so you are worrying about the wrong virus. Here is the Covid forum. https://
www.medhelp.org/forums/Coronavirus/show/2203