same here.
yea Mitch I've got strong opinions on this. LOL.
I might even be able to back them them up some if you really need. Serious on that.
You had three vaccination shots and tkae no meds that suppress your immune system. So yes, the odds are very high that you have antibodies that know how to deal with the virus. More so, probably enough of those antibodies to destroy the virus before it can multiply in you.
So that leaves you with this question. Did you get any virus from Steve at that time? and was it enough virus to survive your antibody response in the last several days?
Since you feel pretty good, my opinion is that now, 5 days later, you are probably not carrying much if any virus either way.
Is it possible that you are asymptomatic but carrying a bunch of it? Its possible but unlikely.
A problem with the testing is in the timing. The day a person gets some virus mass on him/her, there's not enough there to show up in the quick tests. Assuming the virus was able to grow and spread then three or four days later that same test would generally show the person has it.