When you inject T, FT–>E2 increases immediately and you should start AI at day 1.
You need to inject twice a week and dose AI at time of injections.
Feeling good day one and less so after could easily be from E2.
Always post lab work with ranges! FT=3 - 3 what? pmol/L?
At your age, low-T should be regarded as a symptom and not the disease. Was any effort made to find out what the problem was? Testes or pituitary?
You seem to have close to zero knowledge. Please to read the suggested stickies.
Please read the stickies found here: About the T Replacement Category
- advice for new guys - need more info about you
- things that damage your hormones
- protocol for injections
- finding a TRT doc
Evaluate your overall thyroid function by checking oral body temperatures as per the thyroid basics sticky. Thyroid hormone fT3 is what gets the job done and it regulates mitochondrial activity, the source of ATP which is the universal currency of cellular energy. This is part of the body’s temperature control loop. This can get messed up if you are iodine deficient. In many countries, you need to be using iodized salt. Other countries add iodine to dairy or bread.