It likely won’t last, the ride almost always comes to an end. Clomid success stories are rare around any of these forums.
I notice you mention Total T numbers, Total T isn’t bioavailable, focus on the free portion of testosterone, Free T.
So your doctors gave you one massive infrequent injection of 250mg shot, that doesn’t sound good at all. I wouldn’t expect good results in everyone injecting massive doses once per week.
If your SHBG was never considered, time to find a new doctor asap!