Hello ->-bleeped-<-,
It is entirely possible to be a "really feminine man in a woman's body" as you put it. Gender, identity and sexuality are more varied than most people realize, and they can combine in some very unique ways. Gender has more to do with who you are, while sexuality or sexual orientation has more to do with who you are attracted to. You really can be extremely feminine, identify as male and physically be female, and as long as you are comfortable with things that way, you are as normal as you need to be. If those different parts are in conflict because one part does not seem to fit, and you have to act in a manner that does not feel natural in order to fit in, then you might need help with gender and sexuality issues.
To finish answering your first question, transwomen can be straight, bi, lesbian or other; the unique thing about transpeople is that they may start out with one orientation but change orientation as a consequence of transitioning. It is tends to come as a surprise.
