how do I interact with women in the bathroom? with men it's easy, just don't talk, but yesterday a woman asked me for a tampon and I had absolutely no clue what to do or say.

Good idea to carry a couple in your purse for just such occasions. Otherwise in my experience, women who are strangers don't tend to interact. Just do your business, wash your hands, fix your hair/makeup, and go. Speak if spoken to.

Scared to go in the girls bathroom one time I decided to walk home like 15minutes and kinda peed my pants LOL
scary

just act like everyone else does. i got dragged into this right after FFS and BA myself