Producing colostrum but bfn?

I missed my March 29th AF, and now today I'm due again for AF but nothing. Bfn, I went to obgyn and he found a cyst on ovaries. I read cysts can mimic pregnancy symptoms but I've noticed I've been producing colostrum past 3 weeks? I've only checked once a week I don't check every day. I haven't found a link to cysts and colostrum. Any ideas?