Thank you so much for your responses. I truly do appreciate them. And you're right, this is my son's body and life and I do not wish to interfer with whatever he finds natural, whether that be TG or male. I do however, want to ease any pains he may suffer. So, searching for advice and guidance, here we go.
One of my professors is a psychologist, so that's who I spoke with. She feels there is a 90% chance that he may be TG, at the very least, dealing with some form of gender confusion. To give you a fuller, more accurate picture, I would have to spew out a whack load of info. Our lives have been a convaluted chaos for the last few years and trying to figure out what might have had an impact and what not simply adds to all the confusion. So, I will dish all that I can think of at this time. Feel free to question, ignore, run for the hills or adivise, please.
For time's sake, I will do this in point form, well, I'll try, bare with me

. Umm, gosh, harder than I thought...
1. his dad was abusive to me, my boy, T., witnessed many occasions where his father would grab me in a sexual fashion and continue to do so despite me begging him to stop.
2. after the seperation, his dad became physically abusive, which he did witness.
3. we had to move into a women's shelter
4. he had not 1, nor 2 but 3 sisters, all of whom are high achievers, 2 are older than he. 9, 8, T is turning 7, little one is 5.
5. no other male in the house.
6. my mom moved into our home after having to flee an abusive spouse.
7. he witness a male babysitter molest his sisters.
8. he has been diagnosed with O.D.D.
9. he wants to grow long nails, he says they're pretty
10. wants to have his ears peirced
11. his fav toy is a barbie
12. he loves to dress up dolls
13. he sleeps with more stuffies than his sisters do, all of which he dresses up in pretty or cute clothing
14. he has always wanted to wear make-up and nail polish, since he was old enough to walk
15. he tries to sneak his sister's underwear under his own
16. he tries on my bras and stuffs them
17. he wears his sister's bra under his clothes at night
18. he wants to wear my clothes to bed
19. one day he was hiding behind his bed and when my mom asked him what he was doing, he said it was private and go away: he was trying on pantyhose
20. he has told my mom he never wants to be a man
21. he has tried to touch his sister in an inappropriete fashion
22. as per psychologist's advice, I asked him today why he liked to wear girl's clothes, nothing was wrong with him and that I loved him no matter what and the poor boy gave a huge sigh of relief, smiled the biggest smile I've seen in a long time and said, "cause I wanna be a girl". He has been peaceful and happy since that statement. However, he also said he wanted to be a girl because they are better at everything and then he wouldn't fight with his sisters anymore, be a better part of the family.
So, as you can see, there are soooo many factors here that my head is spinning. Have there just been too many negative male role models that he thinks that's all a man can be and he doesn't want to be that way? Or is it just that he is dealing with behavior issues that his sisters aren't facing and figures that he is having problems because he's a boy? Is this just a phase? Or is he possibly a TG? The last thing I want to do is some irreparable damage, but I also don't want to sit docily by and have him struggle all alone, feeling abandoned and rejected. Any advice or opinions or input would be much appreciated. Thank and sorry for spewing, I'll try to clean it up next time