I want to go shop for female clothes as a semi-closeted trans girl but I can't bring myself to do it...

Hello all spacehey users. I am facing an issue... I'm a semi-closeted trans girl (since I just made that up; It means my mom knows but no one else), and I want to buy clothes that match my tastes but everytime I go to the store I get a mini panick attack and end up getting out of there in minutes... The weird thing is, I already beat this problem some time ago. Like a month ago I bought a skirt and it's super cute and I love it but now I can't buy anything else due to some resurfaced anxiety or something... It's like I see everyone judging me when they aren't and it sucks... I think I pass, online on Omegle and stuff, but because I'm very tall I don't think it works that well irl... Help?? I don't know what to do