Pre term contractions

Ashley
I'm currently 33 weeks pregnant and had to go to hospital last night was having contractions every four minutes but no dilation yet so my doctor gave me the shot to stop the contractions which it never completely stop them I'm still having small ones about every twenty minutes! But my doctor said she doesn't see me making it to 39 weeks maybe not even 37 weeks! Go back to her next Thursday and I'll be 34 weeks for a ultrasound to check his growth and she said if I start back after Thursday she will not stop them I'm scared to death I want my baby to Atleast bake until 37 weeks so my concern mommies is as anyone else experience contractions this early and if so how many weeks did you make it to before delivering????