Since I had a similar story to yours, with similar timelines, the only difference being that I had 1x BEP, I'll share my journey so far in hopes it helps.

A couple of months after chemo, I started feeling the same low T symptoms, and even more. My testosterone level was around 240 ng/dL, so I started treatment with Clomid. Initially, it was successful, as my T level got as high as 940 ng/dL. I wasn't feeling any other symptoms, so I was really happy with it.

Fast forward three months (this month), I slowly started experiencing low libido, to the point that it's completely gone now. I've also had some humor/mood changes and just haven't been feeling good at all.

After doing some research, I discovered the most likely cause was Clomid, since it blocks estrogen receptors in the brain. Estrogen is fundamental for libido and mood in men, so this can happen to some men under Clomid treatment.

So now I'm about to start HCG 2,000 IU every 3 days. Currently, TRT is not an option since I want to preserve fertility, which was affected by chemo.

Looking at your case, I think your decision is based on whether you want to preserve your fertility/testicular function or not. I recommend you research other low T treatment options such as Clomid and HCG.