None of the conclusions you arrived at on your own make sense. Your serum estrogen is not low from Tomax.
Tamox (Nolvadex) is a SERM like clomid. He's probably got you on it to control estrogen side effects like gyno. Tamox will block estrogen receptors in breast tissue and prevent inflammation and gyno. It will not lower serum estrogen, meaning the free flowing estrogen in your blood. It just prevents some of the sides of estrogen. Thus, your whole body estrogen level is not low. It's more likely to be high.
Now, Tomax can be a good thing because it can prevent the sides of estrogen without negatively impacting your cholesterol. Use of anti ESTROGEN (AI) all the time will tank good cholesterol in most guys. Its not great for the lipid profile. A lot of doctors don't like that. Tomax doesn't have this impact, but it's also not enough for some men who convert more estrogen and need their blood levels lowered by an AI.
Let your Dr try his thing, if blood results show estrogen in range you're lucky. He's probably trying that first. If your estrogen is too high hell put you on an AI (assuming he knows what he's doing). Better off on tomax longterm than an AI. It is just many people need more than nolvadex (Tomax) to hold estrogen in ideal range.
It's unlikely you have high prolactin from TRT dose test or Tomax.
Tldr: you're too dumb to be second guessing your endo. Let him treat you. Ask for blood results of your estrogen levels.