Freaking out!!! HELP 😭😭😭

So my bf and I had sex but before hand as he was ‘fondling’ me my breast secreted liquid. I thought nothing of it as i had just gotten out of the shower. But afterwards I checked and a white and yellowish liquid was coming out when I squeezed them. What can that mean. I’m almost 99% sure not pregnant so what else can cause this?????