I Lost My Virginity 4 Days Ago. I've Had Mild

I lost my virginity 4 days ago. I've had mild spotting like I expected. we used a condom, it didn't break and he pulled out to be super safe and didn't even cum. I have been spotting up until now, today I saw brown discharge that smells sour and fishy on my panty liner, what does this mean? I need an answer