Help!!!

So tonight while me and my husband were partaking in sexual activities we noticed that my boob actually had some white stuff coming out after he squeezed my nipple, I instantly thought it was because of sexual stimulation to my nipples so I didn’t too but of it but I got curious and squeezed my nipple (it’s been 3 hours since we did anything) and still coming out. I don’t know what it means it’s more white when itson my nipple