Question

Amanda • My fiance and I have been together for 2 years. I have 3 angel babies and am 4w3d pregnant ❤ Xxx
Im confused..sorry to be a pest and keep posting but I keep thinking about this possible m/c ofcourse :/ Im still bleeding red which I know can mean m/c but these lines are odd to me. The bottom test is from the 17th and was really faint then the test from today is noticeably darker...I thought if I was miscarrying that the hcg would have to drop which would make me have a lighter line? Any thoughts or input would be very helpful...