Contractions!!

Hey y'all, I'm in serious need of advice. First baby, 33 weeks. I have been having contractions since last Sunday. For a week now with some back pain. Tuesday my doctor told me I was hacking contractions and that I wasn't dilated but my uterus was softening and starting to open a little bit. My back pain was getting so bad I went into L&D; on Friday. Nurse had checked me saying I was having contractions 2minutes apart and I started to dilate 1cm. The weird part is the contractions were just light period cramps. And I wasn't feeling them 2 minutes apart. I did read that you can have contractions and not always feel them. They gave me 3 shots to stop the contractions and sent me home. Anyways, yesterday morning contractions started again. Throughout the day they have gotten a little stronger and getting a few minutes apart but not always. Today, contractions are a little worse but not close together... not exactly what to make of that? How do they get stronger but not closer and get a little further apart? And these contrActions are off on off on throughout the day.... sometimes they're really close then they're like 15 minutes apart... I don't understand what I should do. My abdomen will get tight too. Even today it's a little tight. I've been on bedrest the past two days per me until I know what to do based on what my doctor says. Stupid doctor on call was very unhelpful and said he can't make the call for bedrest or work. Thanks ladies!