Nipple Stimulation to bring on labor??

C
Has anyone tried nipple stimulation or using a breast pump to jumpstart labor? How long did u pump each breast and how soon did you progress? 
I'm 39+4 with no progress at all. A few nights ago I pumped each breast for 15 min. Again the next day. Skipped yesterday (found out still no progress) but started back up tonight and feeling crampy after the first set of pumping.