See a urologist- but until then—
First suggestion— leave your dick completely alone for at least two weeks- no jacking off, no PE, no nothing. At most you may engage in very light massage under a hot shower- but in no way should the massage be sexual and the moment you begin to stiffen leave it alone.
Second— keep your junk warm.
I would be surprised if you didn’t begin to regain spontaneous/ nocturnal erections within that time
Third— should your erections improve [as I believe they will], do not return to spewing your seed through masturbation—
Meaning, at that time you may consider returning to an abbreviated newbie routine- but, at the risk of contravening the popular wisdom that jacking off is without harm, do not finish a light PE session with cumming.
Save it for the ladies.
There may be a plumbing issue- which is why the urologist is a go, but that may be compounded by, shall we say, overuse.
I believe that your EQ will continue to improve- when it does so, you may want to incorporate a little light edging— with an emphasis on re-learning your ‘grip’.
My opinion only- no ‘aggressive’/ extreme/ serious PE- including clamping, hanging or pumping- should be attempted; anything to do with your dick needs to be therapeutic in nature and such PE techniques may provide stresses that your unit isn’t properly prepared for.
I’d continue the AKG/ NOX supplementation as it does improve blood flow.
Here’s the deal- with any luck you’ll have your unit ‘in hand’ for another 60-70 years or so— you need to think in terms of the long haul. A recovery period of 3-6 months now is a blink on that timeline.
Make haste slowly— be the tortoise.