hmmm?(tmi)

had sex 8 days ago, possible sprig inside.. had brownish discharge today when I wiped... next time going to the bathroom and wiping it was like a white mucus discharge. haven't had this happen before so I took a cheap home pregnancy test, came back negative. (I know could be too soon.) I have irregular periods so I'm assuming irregular ovulation time also. could this actually be a early pregnancy? I have acid reflux so I can't really list over early pregnancy symptoms because they're also caused by acid reflux.