I normally have a very regular cycle, I am now 19 days late, no spotting what-so-ever. My boyfriend and I do not use protection only withdrawal, we're are not trying to get pregnant but clearly we're not trying very hard not to either. I've taken 6 home pregnancy tests which all came back negative, I'm starting to experience early pregnancy symptoms like head aches, slight nausea through out the day until I eat something, I'm constantly tired, sometimes slight lower back pains, I woke up with sore breasts this morning and I have a little discomfort down there. I normally experience bad cramping a couple days before my period comes and I haven't felt that either. Nothing has really changed in my life, I'm not stressed or anything, and my physical activity or diet hasn't changed either. I can't figure out what's going on. Has anyone else experienced this? Am I pregnant? If not, then what could it be? I want as many opinions as possible. Let me know what you think. I'm going to the doctor today, but how accurate is the blood test? If it says that I'm not is that for sure or what are the chances it could be wrong? I did go to the doctor this morning but when I explained all of this she simply said, if after 20 days it still doesn't show on a home pregnancy test then you are definitely not pregnant, she says no matter what it would've shown on a hpt by now. She took a blood test for me anyways so I would feel better but she still believes there is no chance I would be pregnant. I get the results back tomorrow. Do you agree? If after 20 days late it still doesn't show on the home pregnancy test then they definitely means no? I've heard several cases of people peeing on a stick and not getting a positive result until a month later, sometimes longer. Please tell me what you think. I was very skeptical and I'm thinking about looking for a new doctor.