Bleeding..

Did anyone have bleeding at all during pregnancy? I would be about 4 weeks 5 days and all of the sudden I started cramping alittle and spotting and now it’s a very dark color. Not like my usual period.. I was 2 days late. Had no signs of starting and also got a faint positive on first response. I don’t understand.. the cramps don’t really bother me. Should I go get checked?