Uy mama, I know this is worrying pero please check in with your OB agad, kahit quick call lang, para ma-assess niya in person, lalo na may discharge ka. Brown discharge in early pregnancy can mean different things, at kailangan ng doctor to rule things out properly, especially since you're on medication na.
A few of us mum friends din nag-experience ng spotting early on, but that doesn't mean all cases are the same, your OB needs to see the full picture. Fingers crossed it's nothing serious, pero don't wait lang para sa peace of mind mo, bes. Let us know how it goes?