I understand this must be quite surprising or even worrying for you. Breast milk production is triggered by pregnancy hormones, so having it beforehand should be evaluated by a healthcare professional. Please don't stress, just book an appointment with your gynac.
Gosh, I am in my third trimester now and still waiting for my body to figure out the milk situation! If you are getting it before even getting pregnant, it could be a hormone imbalance like high prolactin. Definitely check with your doctor to get it sorted out!
Producing breast milk or having discharge before pregnancy is not normal and could be due to high prolactin levels, which is sometimes linked to thyroid issues. I had thyroid during pregnancy and had to do regular doctor follow-ups to keep hormones in check. Please consult your gynac soon to get this checked.
I didn't experience this myself, but a close friend had some nipple discharge before conceiving. She went to her doctor who did some simple blood tests to check her hormone levels. It's best not to ignore this and just let a doctor guide you.
When I first noticed fluid before I was even pregnant, I felt so confused and scared. It is actually not very common to produce milk before pregnancy, so it is best to speak to a doctor. They can easily check your hormone levels and reassure you.