Hi Jeni, I think you have made a start in just recognizing that things are pointing there way towards your questioning your Gender and feelings. Until you establish where you stand on gender issues, I think worrying about sex and relations should be put off for awhile. Dont overload yourself with too many issues at once.
The advice I try to give to anyone asking gender questions about themselves is to consider seeing a Gender Therapist that is versed in and sypathetic to transsexuals. Do not worry too much about your age, I was 60 when I actually allowed myself to transition. I am still married and have children and grandchildren. I will say that I finally have a measure of peace in my life.
Whatever you decide to do with your feelings, just remember that you need to take your time, and if this is your destiny than it will come on its terms.
Hugs
Wendy