Period then BFP

So i had my period 17 days ago, i felt sick and general pregnant so took a test and it was negative fast forward a week still feeling sick and period was shorted than usual and lighter but started bleeding again, this time pink. So took another test, vvfl.. so though okay chemical.. had one before, no big shakes, we aren’t ttc but also aren’t not if that makes sense.

Last night i felt exhausted and still been feeling sick so took another test today and positive, its on one step ones which i have never used before, so i went and got a digital CB, and took it, says 1-2 week.. zero hold.

Is it a chemical or do you think I could be pregnant