I am 33 weeks pregnant and having abdominal cramping. The cramping makes me feel like I have the worst upset stomach in the world, but when trying to use the restroom, nothing results but violent, forceful pushing. I went to the doctor 3 days ago with the same symptons and they said that baby was fine....this isn't normal to me...they even had to give me a shot to stop contractions--I was up to 5 an hour. I can't seem to get any answers and am getting very concerned. This is my first pregnancy and I am 26 and scared...done everything right, just want to know why this could be happening....

Optional Information:
Female , Age: 26

Already Tried:
Talking to my OB via phone, going to Mercy hospital, fetal tests and doctor recomendations