Aw mama, totally understandable ang praning mo pero relax ka lang, you already have four TVS scans and healthy ang baby, so that's your real reassurance dito! The faint line on a PT at 2 months is normal kasi the hormone levels fluctuate and it depends din sa brand ng test, kung diluted ang urine, at kung gaano kalaki ang hCG output mo that day, hindi siya sign ng anything bad, honestly. A few of us mums have experienced the same thing and nag panic kami for nothing, haha! Since ang doctor mo na ang nag confirm via ultrasound, stick to that and trust your scans na lang, hindi na kailangan mag-overthink sa home tests. But if the praning is really eating at you, no harm sa quick call sa OB just for peace of mind, para di ka mag-stress ng onting-onti na lang, lalo na ngayon pa man lang ang pregnancy mo.