Sabar ya dear, faint lines memang boleh jadi sebab hormone masih rendah lagi especially kalau baru 6 weeks, HCG level still ramping up, so that's totally normal! A few of my mum friends also had the same experience dengan UPT samar, tapi once they reached 8-9 weeks, baru terang betul. Best thing is tunggu a week or two and test again, or better yet, go for a blood test with your doctor sebab that's way more accurate untuk confirm and check HCG levels properly. Congrats on the pregnancy!