What is your protocol like? Testosterone dose, frequency of injections?
When I first started TRT, I tried arimidex and had horrible headaches, and I completely tanked my e2. It was unreadable, below 10. At some point I switched to aromasin and was having similar issues (not to mention that aromasin causes hair loss through its metabolite). Recovering from my E2 being tanked took several weeks and was an absolute nightmare. Extreme fatigue, anxiety, heart murmurs, no libido. Generally feeling like dog shit.
There is a great read somewhere around here by a dude named PM Gamer, and it goes over how to manage your estrogen using your morning erections. Its how I manage mine, with the periodic blood test obviously.
I take 1 50mg zinc/2mg copper everyday and also 3mg of boron, both can have anti-estrogen properties. But I think the main thing that worked for me was the DIM. I had an e2 of 33, which isn't awful, but was definitely causing erection issues, lower libido ect. Once I got on the DIM, 2 pills in AM and 2 pills in PM my e2 went down in probably 2 weeks. Then I started to get INSANE night and morning woods, libido was insane, walking around the house with a half chub all day for no reason.
Then the woods got weaker and I thought maybe my E2 was a little high, well I did a blood test and saw that it was actually a little low. So that helped me out a lot.
My biggest tells are: E2 too low, ability to get erection, but inability to ejaculate easily
E2 too high, Soft erection, low libido, cant ejaculate because of weak erection.
But I use my morning wood strength to determine if I am either high, or low. If its not a diamond cutter when I wake up, I know I'm a little high, or low. Then i usually self examine (ahem) and if i fall into one of the above categories, i have a general idea of i am too high or too low. Then i either back off the DIM or increase, for a day or so. Once you get dialed in with it, its actually really responsive. I felt my e2 was high, so i took 4 pills at night, and it brought my e2 down by the next morning.
I always consider sleeping as a reset. When you wake up, you'll know where you are regarding your estrogen. As far as messing with your estrogen, i would wait until you start getting high estrogen sides or get a lab to confirm high estrogen.
I don't mean "wait" until you get high estrogen sides. But if you start having a soft dick, oily skin, crying for no reason, hella emotional, dick and testicles all sucked up into your body. Your E2 is getting high. Star the DIM. Id start slow like your plan, one in AM one in PM. Or, i just take 2 pills at night right now.