Sounds like a chemical pregnancy...they generally happen so close to a period that some women never even notice they were pregnant at all. False positives are incredibly rare..and the HCG probably didn't get high enough to last long in your system.
I had the same issue with the tests they didn't show positive till i was 6 weeks. Im now 36 weeks.
You said they did a blood test and it was negative. That, and the fact you have been bleeding, indicate you are no longer pregnant.
They didnt do any ultrasouns or anything so hoe would i know forsure and its not just my period being weird ?
Sounds like you had a miscarriage. You were pregnant (which is why you got a positive test) but you've now miscarried (which is why you're now bleeding).
It could be an early miscarriage, maybe.
Both and they both were negative
Did they do a blood test or a urine test?