I have a gut instinct I am pregnant. Has anyone else had that before?

I truly believe that I am pregnant. I don't know if I am right or not, but I just have this tremendous feeling that I am. Things inside of me feel so different and I can't even describe how it eeels. I just feel like I am carrying a little angle and I must protect it. I took like 7 tests at home and 2 came back positive, the others came out negative. I took the stests a week prior to my expected peroid. My period was supposed to come yesterday, and I'm holding out to see if it comes today or tomorrow. As of now it is 1 day late. For all I know it could start in an hour or something, I just can't shake this feeling. I am like in a dreamstate and it doesn't feel real and I just know my life will never be the same again. Is that how you felt when you were pregnant? Oh and I went to the doctors because my boyfriend was like you should get a bloood test, so I did and that was negative. They were like come back in a week, it may be too early to test. So I am going to my obgyn on next monday, a good week after my expected period. So I am hoping it comes out positive so I can not feel as though I am creating this whole thing in my head. I feel like I am going crazy! And the emotions I have been feeling range from so happy to hysterically crying on my bathroom floor. I am so snappy and then happy the next minute. I can eat like crazy and I just feel like I am going crazy. Has anyone felt this way before?