 [ Symptoms ] 11 mo has had d since thursday thought it was a stomach virus but now stool is blacktarry do i need to call the dr  his diarrhea started on thursday and became much worse friday and saturday the last few diapers have been thick blacktarry do i need to call the doctor now or wait and see if this gets better over the next couple of days [ Disease ] i would suggest you take another home pregnancy test and do it first thing in the morning when your urine is most concentrated your spotting could indeed be implantation bleeding or it could be the arrival of your period only the home pregnancy test can tell for sure if you take another pregnancy test that comes up negative but you fail to have a regular period i suggest you consult a gynecologist to find out what is going on a number of factors could cause you to skip a period and yet not be pregnant your gynecologist can sort through the possibilities and figure out what is going on wishing you all the best for a positive test i would say try taking another test i read that sometimes it is better to take another test a week after the neg test this might help <link>