People say I pass but I actually don't

For reference I'm 20 and pre-T, and I should be able to start it in 3 months so hopefully it will help me.

My problem is that recently I have not been passing at all and I don't know why. Previously, I passed pretty well, was always gendered correctly by strangers 90% of the time and my friends that know I'm trans told me they thought I was cis before I came out. But in the past few months I just got misgendered every time by any new person I met.

I bind and pack everytime I go out of the house, I've trained my voice and many people told me it passes to them, I wear masculine clothes and I don't have particular feminine mannerisms. I haven't changed hairstyle, didn't lose or gain weight, still wear the same clothes and act the same way as when I passed. But still, everyone assumes I'm a woman or I'm trans. My friends reassure me that I still pass as I did before, but it's just false.

I'm at a loss and don't really know why things changed, it's really taking a toll on my mental health.

Has this happened to you? Is there something that I didn't think of? Any advice on how to pass again before starting T?