FSH Recovery with Tamoxifen/HCG?

So, if HCG then > FSH 0, or close to it.

If one then adds tamoxifen, will FSH increase or would one have to drop the HCG entirely to see FSH recover?

Your body thinks HCG is LH so it will shut your natural LH and FSH down.
If you are trying to restart just use the nolva