"I didn't recognise you then"

So this girl I work with I told her I had feelings for her but she turned me down. She was fine with me for a couple of days and then her behaviour just changed and she became distant with me and got with someone else.*

The other day we had a conversation where she said my name and she was moaning about work so she recognised me then. I walk off after this conversation and we bump into each other she said that she didn't recognise me then after we had a conversation 2 minutes earlier. I brushed it off and just said I was going to wear glasses but I had a spot on my nose and she said she had one too. The day after that she started wearing glasses.

To me it's weird and I don't know what she wants. Advice please? *