Yea Doc is sending me for some further tests to see if there's an underlying condition to cause my breaks, as you say an ab rollout shouldn't cause it to break .fingers crossed it was just a freak occurrence.
Yes, broke other rib last July 2015 and It was pretty much 100% by Dec. It's fine now too and prior to the break last week could do all sorts of activities, golf, all gym work, chopping trees, swimming etc.
obviously you need to trust your instinct and your doctors opinion. I too was very cautious first time round at the 8/9 week mark but my doc said it was healed and not to worry too much as long as wasn't doing dangerous activities.
If you have health insurance or can afford it get an ultrasound scan which will show how the fracture looks it should be a smooth line (or possibly have a bump from extra healing callus)..
Not sure if you hurt your rib on the right or left but if it's on the side of you bottom hand (golf grip) you'll have some compression in your down swing which might make it a little sore for a while.