Weird Period

Ok so I know everyone will tell me to go to the Doctor and I already did. So now that that's been said I'm just looking for similar situations to put my mind at ease.

Since May my periods have been coming later and later and lighter and lighter. I was 10 days late then 12 and then 20. They lasted from three heavy days, 4 moderate days and my most recent was spotting on and off for about 7 days hardly any real period. I am usually pretty normal maybe a day or two late here and there and my period is always 5 days with the first two days being heavy.

I took a pregnancy test and it was negative so I went to my doctor about two weeks ago and they sent me for blood work...well they haven't called at all and when i called them and left a message asking for answers no one has called me back...meanwhile I've been nauseous everyday for about three months. Without the results of my bloodwork my mind is just going a mile a minute and I'm a googler so I'm trying not to be that with this. I'm afraid mostly because I want to be pregnant but if I am not it could be something worse. I'm not really stressed well until these last two weeks. Any advice?

This is the positive part of my post because I don't like to end negative! My babies first day of Kindergarten!!