This is a tough one.
It could just as easily be your bodies response to low estrogen
levels as compared to your test levels.
I would discontinue the proviron, as this will further lower your estrogen levels.
You could start injecting b12 @ 1000mcg/ml a week.
Estrogen is not necessarily the enemy. You need it to promote wakefulness and
a mentally alert state.
This could be from the spike in levels you got in your frontload.
You say you are administering 500mg a week, is that broken into
multiple injections or a single injection per week?