Advice please, desperate

AF is very late (at least a week, I'm irregular) ...3 days ago I got a faint positive in the afternoon. Took one again at 2 am (couldn't sleep lol) and still very faint. Took one in the afternoon and still faint. Took one the next day (again afternoon as had to go buy test) and still really faint! I've given up testing. Could it be that I need to test in the morning or could I be miscarrying? So stressed! They got darker immediately with my son :/