Should I Be worried or not?

Robin
I am 27 weeks pregnant as of yesterday. Yesterday I had a check up and did my glucose test. I felt fine yesterday right up til lunch when I began to feel short of breath and like my BP was bottoming out. It passed quickly and thought nothing of it until tonight when my husband and I met up after work for a bite to eat and hang with some of our friends. Everything was normal, I ate good (French dip pannini with water), hung out for a little while longer. Baby girl started kicking right on cue and knew it was time to head on home (she gets a little violent sometimes) My husband left about 30 minutes before me heading home. On the way home, I began getting severe pain in the mid to lower portion of my belly. By the time I got home (15 min) I was in so much pain I went straight to the toilet. It felt like severe gas pains. I began getting short of breath, light headed with waves of nausea, but I never got sick. I didn't strain, but once the bowels started moving the pains amped up all the way around my back. After about 15-20 minutes of my husband standing over me, keeping me cool with cold bath rags it began easing up. That was about an hour ago, baby girl has the hiccups right now so i feel she is ok. I guess after all that being said, is this normal or should i check in with my OB? I was so worried I might be going into labor. My whole body feels like I just got hit by a Mac truck!