How long after being exposed to conjunctivitis will it appear?

My aunt is a hairdresser and dyed my hair yesterday when she had conjunctivitis.... I was reluctant but she said it would be fine. But her hand brushed against my eyelashes a few times and I’m freaking out a little, I have a big presentation in work on Friday and can’t have conjunctivitis! I also get bad allergies so often touch my eyes without realising.

I know she probably shouldn’t have don’t my hair so please don’t lecture me about that - if I have caught it, how long will it take for the symptoms to appear? I saw her yesterday (Tuesday)

Thanks!!!