Help! Contractions or Braxton hicks?

Brooke
Last night I could not sleep to save my life, I tossed and turned all night long. I'm not feeling to good my body just feels blah, but I have been having an excessive amount of pressure in my vagina with really bad cramps and shooting pains, I'm a first time mom so I don't know how to distinguish Braxton hicks from normal contractions.. Can any moms help me out with some of yalls opinions on what this could be? Should I be concerned and call the doctor?