Mike, welcome to EM!! Glad you joined!
CW is right! The protocol you're on is going to be difficult to manage at best. The half-life of the medication is at/around 7-to-8 days, and the peak value is around 2 to 3 days after injecting. If you inject 300mg, you will probably see a spike around the 3-Day mark at 1,200ng/dl -1,400ng/dl ..?? Something around that, it's speculation, but you know what I mean? So by day 14, your serum levels won't be baseline, but it will be heading there real quick! (18 days is what it took me about 5 years ago).
Also as CW noted, the big jump in total serum is also going to promote a spike in E2 conversion, so the imbalance program just compounds downstream, and with your well being. As CW also noted, this can be addressed real easily just by taking the same amount, breaking it up into 2x per week dosages. With that, you capitalize on the peak value every 3.5 days, which provides minimal fluctuation with your serum levels, which also pays it forward with keeping your estradiol in check, or at least very manageable.
I can't really think of anyone over the years who has had any decent experience with the VA and HRT, but I could be wrong(?). At a glance, I would think that should/could be the place where the best of the best for HRT physicians & endos would be?!?!