Faint line question

Michelle

Ladies I have a question I have very fain lines on my pregnancy tests but a pregnant on a digital but the super faint lines worry me. Did this happen to anyone before and had a viable pregnancy. Idk if I conceived late November or late December because November I had potting three days very weird compared to my periods and December I had the same thing so I could be 7weeks or two weeks that could explain the fain lines. Just confused. Anyone had the same happen.