HCG monotherapy will still increase Estrogen compared to normal. You would probably be primary or secondary, yes. It may be work taking an AI, the only other way to adjust it since you're already subq & x3 weekly would be lowering dose. I'd only worry about it if your having E side effects though.
Interesting. It seems you may simply have a higher base Estrogen. It is likely that the HCG will have also raised it slightly & may be worth taking another look at it now. The 7 to 8 week mark is a good time for review testing if you feel any symptoms or just want to know. You may be the type of man who would benefit from a low dose AI normally.