Faint Line PT

Positive pa din po ba? Panipis ng panipis ung faint line? Nagheavy bleeding ako with large blood clots last week. 1st tvs wala nakita na sac, according to my OB baka daw too early pa or possibly chemical pregnancy. PT shows positive result (1st & 2nd PTs as per pic), blood test shows 271HCG level, accdg to my OB around 3 weeks na daw. Pero now, nagllighten na lalo ung faint positive PT (3rd & 4th PTs). My OB gave me heragest pampakapit if incase lumaban si baby. Next week pa ang balik ko sa OB for another round on tvs, to ensure kung nagproceed ba ang pregnancy or talagang di na kinaya ni baby ?. Has anyone experienced this pero nagproceed successfully ang pregnancy. TIA sa magsshare mga momshies..