Am I pregnant?

so about2 weeks ago I had sex twice in one week. I let him finish inside of me becuz I'm on the pill and have been taking it correctly. well I starting to worry becuz my period is due next week and I'm having brown liquid come out on my panty liners and barely any blood .. i don't know if it's implantation bleeding or if it's just spotting since my period is next week and Doctor said they're will be spotting while I'm on the pill. I got on the pill for a reason so I wouldn't have to worry anymore.. plz help