I just went through these emotions The other day. I bought a new outfit at a store in guy mode and went to khols looking for stockings and panties.
Found myself alone for first part found what I was looking for. But then there were about 6 different women in the department so I put on my big girl panties and shopped right where I was and bought 5 more pairs of panties.
So I got 6 panties and as I approached the front I saw the line and there where men in it 🤔 so lost all courage for a moment and came up with a solution.
I picked up one mens t shirt and used it to hide the rest of my items until I got to register. So if you act naturally in the same situation next time regardless of how your dressed you should be fine.