Castor Oil vs Mineral Oil

I know people use castor oil to induce labor. But I'm curious if mineral oil would have the same effect since it's used for the same purpose in non pregnant people. I'm asking because I have been super constipated (sorry tmi) for the last 3 days and I've tried a bunch of other things to get things moving along, to no avail. The last thing I have on hand to try is mineral oil. I want to take it to get some relief, but could it cause me to go into labor? Even if so, would you risk taking it if you were in my situation? I'm 38 weeks by the way.