Ahhh I feel you, DPO7 tu memang stage yang samar-samar lagi, gula! Line yang tak nampak sangat tu biasa - some of us tried testing early and dapat the same thing, pastu a few days later baru ada proper line. Your symptoms (mual, bau-sensitive) sound promising tapi honestly kat stage ni better you test again in a few days or check dengan doc kalo rasa tak confident, they can do a blood test which is more reliable from earlier on. Jangan stress sangat dulu, just try again in 2-3 days and see la. Fingers crossed for you!