I know this comment is several years behind and probably doesnt help these ladies out, but it might help others who are searching for answers to their questions concerning incision pains from previous c-sections, pain that is quite different than a contraction. Allow me to share my mother's story.
My mother was 38 when she found out that OOPS! she was pregnant after almost 19 years. She found out after her GI doctor denied to perform a colonoscopy (they run a pregnancy test before doing this procedure, and if pregnant, no colonoscopy). Since she has fibromyalgia (basically, everything hurts like ten times worse than what is normal), and a little of this a little of that, she had to discontinue various medications, which throughout the whole pregnancy, she suffered SO much pain! SO, she had to suck it up pretty much.
However, towards the 6th month of being pregnant, she started to feel a "different" kind of pain. She has had two previous c-sections: having me, and to remove a cyst from her ovary. So there is definitely scar tissue. She would describe that she would feel like she was being cut open, sharp pains, and she felt bursts of little "shocks", like when you're at the grocery store and you bump into someone driving their cart and you both feel a "shock" thing. And as two months pa__sed by, obviously it got worse, to the point that walking to the restroom was a ha__sle and very painfull.
She would go repeatedly to the ER, all they would give her was terbutaline (because monitors said she was contracting). She was never dilated, always closed, but OP! Lets give her lots of terbutaline! and nifedipine! well, she switched OBGYN and hospital for a much and i emphasize MUCH better doctor and hospital because she felt she was not being cared for and felt she wasnt getting any answers from these people. This was at the 7th month.
She was getting her usual twice a week nst's, baby is moving great, but still contracting. Maybe yeast infections? urine infection? NOPE. By this time she is feeling weaker and weaker, more and more excrutiating pain. One day, a tuesday to be exact, I took her to go get her usual nst's and a consultation with her high risk doctor (by the way, she NEVER got nst's at the previous place, no care at all!)and a different nurse takes the nst for my mom. We've seen her before at the OB Triage when we have gone at random hours because of her unexplainable pains (a nurse from the previous hospital told my mom " Your uterus is probably just one of those that likes to contract"..really?? What a thorough answer! That explains everything! WRONG!.) This nurse wasn't really our cup of tea but little did we know she practicly saved my moms life and my little brother's as well.
So shes getting the belts around her, of course shes contracting. The nurse asks my mom "How are your incision pains?" At first my mom didn't understand her and said fine. Later she told her no, she wasnt fine, it hurt a lot..A LOT. This nurse called her OBGYN, asked if she could get an ultrasound on those incisions. WHy? she had a friend/co-worker have this same problem, and by a very timely ultrasound, they found that she had "windows" on her incisions. HER PREVIOUS SURGERIES IN HER UTERUS WHERE OPENING. She was 32 weeks. Baby was born that day by emergency c-section. My mom was 35 weeks. An ultrasound was done and Her uterus was like her doctor explained:" Imagine a ziplock bag, opened from the top, but with water inside and a nice goldfish swimming in it. Your uterus is opened from the incisions, and the only thing keeping baby put is the placenta, the bag of water. If the water were to break, you would have bled to death in a matter of seconds, and no chance for you to make it to any hospital. You and your baby would have not made it." But that didn't happen, thank God of course. But mom had a messed up uterus, had to be reconstructed. So shes recuperating, thankful shes alive to take care of her newborn son.
So, please, this is no joke, the pains you feel could be telling you something. Ask questions, demand tests, do what you have to do to find out why you are hurting so much. If that awesome nurse would have not ordered that ultrasound, we would have just went back home and that day I wouldve lost my mother and my sweet baby brother. Not trying to scare anyone, but rather tell you how it is. If you have to switch doctors, DO IT. You deserve superb care. Hope this experience will help others to find some answers and take action for their health and their baby's.