This sounds pretty normal, Michelle. I think we have all been there.
Most of us spend some time presenting androgynously until we become more comfortable with ourselves. Gradually, we work up to presenting fully in our proper gender. Fear is our constant companion until we begin to realize that most people really aren't going to give us any problems. The more you get out there as yourself, the less fear you will feel, and the more confident you will become.
As your presentation evolves, the choice of bathrooms should match your presentation. So if you are presenting male, use the men's room. If you are presenting female, use the women's room. If you are presenting androgynously, use whichever one seems best at the time.
Just keep on doing what you are doing. Get out in femme mode as much as you are comfortable with. The more you do it, the easier it will be. It sounds like you have some supportive friends, so make use of their support when you can.
Relax, and enjoy yourself!