Pregnant or not?

[mommymadness]

I am 18 years old and me and my husband have been ttc for a year now. (if im pregnant it will be a year to the day!) but i am almost 18 days late for my, usually pretty regular, period. my cycle is usually 27 or 28 days long and has never been more then 4 days late. I have had lots of symptoms... my breast have gotten a little bigger. i cant really see it but others can. i have a huge vein all the way down the top of my breast that looks like i took light blue marker and drew on it. im bloated and am having egg white looking mucus and a lot of it. My period was due the 15 or 16 and i had some brown blood that was only on the tp never on my pad on the 17 and 18 and on the 19 i had 2 light pink blood spots on my pad about the circumference of a pencil. I have taken 6 pregnancy test and all were negative. i have been less stressed then normal and have not been sick or taken any different medications and have had no previous medical issues that could cause this. I will be going to the dr as soon as i miss my period for the second time in a week and a half. has any one had any similar issues? could i be pregnant and still not have enough hormone to pick up in an at home pregnancy test? Could it be a serious medical issue? My mom didnt find out she was pregnant with me till she was almost 7 months pregnant... could lack of the hormone in pregnancy be genetic? ANY information would be appreciated! I am starting to get very concerned.. This is not common for me at all!

[Kamiro]

bump....Sorry no advice