Hcg too low? Normal?


So I'm on day 2 of my missed period. I took this test (below) yesterday and the line popped up immediately. It's still there but its faded:/ and I took another this morning and the line was barley there.. with my son I tested 3 days before my missed period and it was bright positive. Is it normal to not get a bright positive til a week late? Should I test in a couple days? I'm just scared and nervous:/

Sorry for the picture being edited, wanted to make sure my husband could see it lol