Is this common?

Shauntai

A couple of days ago my breasts started leaking, and not just a little bit but a lot. I'm only 21 weeks and this is my 2nd pregnancy. With my daughter I didn't start producing till after I had her and I wanted to start pumping early before the baby gets here so I could save up, but I heard that it could cause early labor so I'm not really sure about it now. Has anyone else started leaking early like this and did you pump or just wait till after the baby was born?