If 38 weeks pregnant with first child 3cm dilated 100 effaced and at plus 1 station what are the chances of not going into labor for weeks?

There is no information about contractions or frequency, the status of the membranes, or the Bishop score. These factors would all play an important role in determining the likelihood of labor within a certain timeframe.

Without more information, it's not possible to accurately estimate the chances of not going into labor for weeks. It's important to have ongoing prenatal care with a healthcare provider to discuss the progression of labor and any concerns.