Colostrum?

Sorry in advance, this is gross. Just wondering about leaking, as this is my first and I'm not sure if that's what's happening haha! I don't feel the sensation of my boobs leaking or anything, but occasionally getting in the shower I have some dried yellow goop/crusts in the centre of my nipples. It's a reeeally small amount and I thought it might just be dry skin cells coming off? Haha. But now I'm wondering if it's colostrum? I've noticed it about 4 times, one side or both. 28+2 today