Any time your viral load is >undetectable, transmission is a risk, albeit a low risk. Is it possible that your viral load decreased? Yes, but it isn't certain what your viral load was since you missed some doses.
If you miss your dose of medicine, you are likely to have a detectable viral load (above 30 copies). As explained to you by CurfewX, having a detectable viral load means that the virus can be transmitted.
We have discussed this before that your partner was exposed to the virus and he needs to take a duo test at 28 days for a reliable result there is no point in quantifying the risk. If you ask us we will tell you that it is unlikely that he would contract the virus from a single exposure but it doesn't mean that he is in the clear.
In reference to the question you had asked the other day whether you are an elite controller? The answer is No, you aren't because if you were, your viral load would have been under 30 copies with out medication.