that's a bit odd for estrogen to be that high on 100mg trt
how's your SHBG? what's your free test look like?
as for managing your gyno - there a number of things you can do...
first, start using an AI to get that estrogen under control - you can likely get it into range using an OTC AI. something like Sustain Alpha should do the trick (7,8 benzoflavone and resveratrol). more potent AI's may crash your estrogen - we also don't want that.
Utilizing the power of DHT (assuming your PSA is G2G) - DHT is one of the bodies defenses against estrogen related issues, as DHT has a high affinity for the estrogen receptors and will render them inactive. You could use something like Ultra Hard (epiandrosterone and androsterone) or Ultra Epi (epiandrosterone). This won't lower estrogen, but it will help fight the effects of estrogen - would work well in conjunction with a lite AI
limit caffeine intake - caffeine can inhibit the clearance of estrogen in the liver (via p450) - this is the same mechanism that breaks down caffeine and estrogen...if you're like many and use a lot of stimulants.
once you have estrogen under control and tried the above, if you still have a lump, you could also investigate using a SERM like tamoxifen or rolaxifene