Pregnant 5 weeks pp?!

I had a csection with my son 5 weeks 1 day ago and the hubby and I didn’t wait the recommend 6weeks. We waited 3. I know, don’t come after me. We also didn’t use protection because I’m breastfeeding and we didn’t think I would have ovulated. I haven’t told anyone but I got a positive on a pregnancy test today. Could this be the hormone still in my system from having my son or do you think I’m pregnant again? I have my 6 week appointment next week and will obviously talk to my dr then. Just want some opinions and experiences.