I went to my doc and got my blood work done, no questions no problems.
I just told him that I felt lethargic, wasn't sleeping, etc.
If you decide NOT to get the blood work done, the soonest I would suggest
restarting is at least 14 weeks (length of cycle w/o PCT) after you end PCT.
But like HisAngriness stated, "time on = time off" is the best way to go.
Best of luck