I have always been regular with my period every month same time it lasts 5 days then done like clockwork But in July I missed my period, I was a little stressed planning a surprise party for my mom it was the 23rd I thought after that I'd have my period it was due the 12th . But it never happened I took 4 pregnancy test all negative is this normal should I be worried. I've been pregnant before I have a 11month old I don't have any of the symptoms I had with him in early pregnancy no sore breast , cramps without period and no discharge either.