Braxton contractions

I am 27 weeks and have been feeling this baxton contractions, and some pelvic pressure for 4 days but today the contractions and cramps (no strong cramps but uncomfortable) don't go away, I have been feeling this for about 5 hours today. this will be my first child, so I am not experience with this, can any body told me if this is normal at this time? Anyone has experienced something like this? I have a appointment tomorrow, I don't know if I should I go to a emergency room tonight or wait for my appointment 😳