hormonal changes can happen, yes, and estrogen is present in both sexes. In my case, before I was on hormones, my T level was very low, and my E was high. I only ended up taking a small dose of t-blockers. My estrogen levels are pretty high, although high doesn't mean things worked faster or anything.

Even post-op (I had SRS), I still have some T in my system, but not enough to do much other than to keep me healthy. It's in normal ranges, and a little T is good. It won't make me guyish at all with a small level. LOL

My e-levels are still bouncing up in the high zone. I've gotta get them checked again, actually. I'm hoping they have leveled out some. o_0

I also had low T and high E levels before I started taking E. The Dr. said that he had seen this as the usual case in TG people. It was reassuring that there was something physical to my gender dysphoria.