Redip if you have too and make sure them damn Mediums your using are moist and not saturated..
Onetime I was in in the same scenerio you are in right now I pulled it outta the Jiffy pellet to see my stem was swollen (means its almost ready to root) so I re dipped and stuck it back in the same Jiffy and 3 days lady from that 7th day, so on that 10th day I seen roots.. and supprised myself. Then just thought about it and come to the conclusion my Pellets were too wet yet.