So Im 9 days late for my period and up until today I've been doing tests, clear blue digital then first response ones and cheapie ones which were all negative so today at about 17:30 I did a boots own brand digital and that said PREGNANT, then half an hour later I did a second boots own brand digital which said NOT PREGNANT! I don't know which one to believe? I didn't drink anything in between tests either. Can anyone shed any light? I'm not trying to get pregnant and his will be a shock but I'll deal with it if I am.