BLEEDING SCARE!!!

Lauren • Love my little family 2 girls and another on the way!!!!
On my way to work this morning and before I left the house (warning TMI COMING) I had to pee and when I did noticed the discharge in my undies was a pinkish color. I was panicked but tried to keep it cool in front of my husband so he wouldn't freak out. I told him I would call my Obgyn on the way to work to see if I needed to be checked. I called and called but no answer so I swung by the office and was told to go to the hospital. I got to the hospital and was set up on a monitor to watch babies heart rate and contractions (if there was any) which I highly doubted all I really wanted was for them to check me to make sure she was ok so I could leave and go to work. The nurse came in handed me two cups of water and a Gatorade and explained that the bleeding could have been just a one time thing baby is moving obviously and heart rate looks fantastic BUT (oh god there's a but..) but I was having contractions!! 
CONTRACTIONS!?!?! I'm 30 weeks I don't even feel anything but back pain... Then it hit me.. I was having back labor!!!! OMG all this time I feel these tinges and thought it's cause I do a lot of walking or the weight change or I have TWO KIDS. My back is GUNNA hurt! But I've probably been having contractions here and there for 3 weeks now and never noticed!!! 
Damn.. I don't know what labor is going to feel like when it's all in my back...I'm actually pretty nervous now...