What's going on....

I'm four days late according to 3 different period trackers. My boobs are so so so heavy and hurt, (which usually happens before a period too, but never hurt this bad) they itch too... 5 days ago I was puking my brains out, 3 days ago I puked just once, and two days ago I was trying to go pee and kept gagging like I was going to puke.... I took a test yesterday and it was negative, but I feel it's to soon for a positive..? I'm so nervous I don't want my period to come.... I just want to be pregnant...

FYI. I have a 2 year old as well (3 in November...).. Was on the depo for 9 months after her and have been off it since August of 2014 when I got my last shot was April so it wore off in August..... And didn't get a period until January of 15 and we have been trying since January of 2015 so little over a year.... And I'm just getting so confused..:(( I want this so bad. I hope my period doesn't come.:( 

Any thoughts.? Ideas suggestions....?!

Please.