18 w 3d pregnant only one breast leaking colostrum?

I would say that this perfectly normal.Don't stress over it,the nipples dont always leak at the same time.And you are still early. I think you would be fine to save that question for your next doctor apt. But not too worry til then bc this is perfectly normal.Don't worry about a cyst honey thats the last thing you need to do is worry. Chances are highly likely that your just fine. Good luck

I was going to say "Right one right?" Yup, pretty normal, that side will have a heavier let down and more milk but not as creamy (rich) as the left. No, not because of a cyst, for whatever reason we humans tend to be lopsided in our distribution of milk and many gals I know have richer milk in the left breast and we leak from the right most often. After nursing 3 sons and thinking about it for some years I think somehow our left side is more responsive to an infant and specific for let down while the right just lets down, I am sure it has some evolutionary basis, and for sure most babies prefer the left side (don't let your infant stick to that side though or you'll be really lopsided).

It's normal, be cool.