I am almost 8 weeks pregnant and had some tests leftover so decided to do them to "check" and the line looks lighter than it did at 4 weeks!! Had an early scan last week at 7 weeks exactly and seen a flickering heartbeat. Should I be worried? Is this normal?? No bleeding or severe cramps. Continuing to feel nauseous, tired and breast tenderness comes and goes. (The double test pic is now and single at 4 weeks)