Feeling "weird" currently at 30 weeks?

I have been feeling really sick the last couple days vomiting no runs though.. well starting yest I got some contractions and felt quite a bit of pressure.. I had a bath and lied down for a sleep and it seemed to be better until I woke up.. my tummy has been contracting on and off probably 3 times an hour sometimes more.. expecially when I sit/stand, it has been about 6 yrs since I carried full term so I am not sure if this is normal since I have been having a hard time keeping things down? I have been taking sips of water and keeping my feet up at work.. not sure if I should go to docs or if I am just getting braxton contractions? I didn't have contractions with my 2nd pregnancy so I am unsure.. and my first was full blown it never started slow or anything..Also my baby dropped about 2 weeks ago so the pressure has been on and off since then..