confused.

Antonia

i got a positive pregnancy test 5th July but then negative a few days later by doctor. also bleed loads around same time causing me to believe i had chemical pregnancy.

a few days later i took different home test which was negative,

i was due AF 6th August but still not here and no usual signs yet apart from bad back, I've also had strange feelings in my stomach which are not cramps.

could i actually be pregnant?