can you bleed and still be pregnant?

my period was due yesterday and ive been sick for about 3 or 4 days now. no period yesterday. but this morning i started spotting and its daaaaarkk brown almost mucus-y like and only when i wipe.. ive had a pad on all day and theres only 2 drops on it. i took a test and this is it. is it possible to bleed lightly and still be pregnant??