Yes, your dose is too low. Maybe 140-150mg.
Doing any lab work on your own?
Depending on what you are doing with an AI, if E2 is elevated, SHBG will increase affecting FT:TT balance and SHBG does not fall rapidly.
Does your doc have a target FT and TT? He might up your dose. Doc should also listen to symptoms of energy, libido, mood etc and you may feel down at week 3.
Your AI dose requirements need to match serum T levels and your T dose changes need AI adjustments.
Now lets pretend that 120mg takes hematocrit [HTC] and RBC too high and doc freaks out. Such labs may not calm down quickly. Injecting twice a week would be more HTC friendly than once a week and subq better. Some guys have high HTC on TRT and others with higher T levels hardly any effects.