Please opinions!!

Issa
Hi there yesterday morning i test positive like a faint line and the afternoon show up vvvvvvvvfl and i test today i see vvvvvvvfl but my doctor said that my endoctremial lining is thickened can due to just a missed period or an early early pregnancy im so confused can i still be pregnant im 8 days late on my peruod this the first time i missed my period for this long time.