I used to do my HCG the same way and always recovered fine but then started running HCG at small dose (250iu) on cycle starting around week 4 and find recovery much better without any crash. .
A couple summers ago I was running 750mg/week of cyp for 12 weeks. I then had some blood tests done at 5 weeks after my last shot and my LH was still 0. I then got another test done the following week and LH was 3.0 and total test restored. At the end of the day I believe the compound itself, amount taken and how long of cycle will dictate how long all esters require to exit your body.