31w5d and milk!!!

So last night I was leaking what I'm assuming is colostrum out of my left boob.. Second time but last night it was a larger amount and several times I'd wake up to it. Only thing is it's not coming out of my right one yet... Is that normal? I had my right nipple pierced about 5 years ago and took it out when I was around 2-3 months pregnant (never had any issues) but it's making me paranoid that it affected something.