What you are doing is unlikely to cause real problem, at least so far as doctors consider real problem (they can be pretty tolerant of side-effects from pharmaceuticals. For many of them, they have to be.)
However, any reasoning that if a prestigious doctor is prescribing a particular way, that way must be correct, wise, best-practice or anything else would be quite wrong. Many here have already reported their personal experiences of quite the contrary.
Doctors as a group, including those who have been elevated among doctors, strongly tend to keep doing the same thing, which tends to be whatever they were taught to imitate back when working 72 hours shifts as residents. And to do what the pharma detailers (sales reps) push on them. It’s how it is.
When I first started writing on anabolic steroids and related drugs in 1998, yup, everyone used 5000 IU at a time. Standard practice. So far as I know no one used less. It’s what doctors did.
HCG was pretty much universally considered a “harsh drug.” Water retention and even gyno were common side effects.
I looked at the issue and decided that what was happening was likely this: HCG has a relatively short half life. Doctors and patients don’t want the patient having to come to the office with high frequency for followup injections. If the goal is to space injections apart by 2 weeks or better yet a month, then how can this be done when the half-life is short? Only by injecting enough to give stratospheric levels, far beyond necessary, but which will give sustained effect due to being such gross excess.
That was a hypothesis. The important point would be, what does use reveal.
Use revealed that far lower doses, such as KSman and others here advise give great results without the adverse side effects so common with the huge dosings. Dose/response studies, including intratesticular testosterone level, have totally backed up these much-reduced levels compared to the past. The literature totally supports the lower doses.
Multiple MD’s who pay attention to what works and to new findings have dropped their dosings to these lower levels. Vials however are still large size and common practice among MD’s still is to inject an entire vial at one time, regardless of the overkill. After all, it’s a proven dose that’s right there in the package insert.
People here are advising you accurately with regard to how dosings work. Your doctor is advising you accurately in the sense of matching the package insert and what they were doing back when he was in residency. If he started residency injecting full vials at a time and since then has generally or always done the same and given little or no trial to lower-but-still-fully effective doses, then he doesn’t have a comparison to make.
With regard to a theory of overdosing HCG (in terms of far exceeding the amount necessary to get full LH receptor response) in the hopes of getting weak-agonist effect at FSH receptors… what a way to accomplish that. Yes, there have been studies of combining FSH, which is available, with HCG for fertility. It would make much more sense if desiring FSH receptor agonist effect to dose FSH appropriately rather than to mega-dose HCG.
However, as mentioned, your path is not medically dangerous. If your estrogen levels don’t go too high, you should do okay.