I would take it all as a win. The girls may or may not have been talking about you, but if they were. Win.
The lady at the craft store may have been referring to your purchase as something her son. And your reply would be "Excuse Me???". So win.
The last one viewed you as more androgynous. Which may or may not be what you were going for. So we can could that a Win.
All in all, it should be seen as a good thing. don't let the little things set you on edge, Helena. You're still a cutie.