Boobs leaking milk

It's been a while ladies. So when I had my first it was 10.years ago, 16 months ago I had my youngest and I stopped breastfeeding at 6 months. Last night my boobs leaked milk and I have had the feeling of my.boobs filling up sensation on and off. Is this normal? I'm on the coil non hormonal one. Do I need to test for pregnancy or speak to my drs. Now I'm worrying as I have been caught on the pill which is my 16 month old,so as you can imagine my mind's on one with worry.

Thanks girls.