After length work your penis should be longer...for a period of time..or at least be the same size?Turtling is not something good , i never get turtled and i stretch like a mad man...also if you don't get an expension after girth work or jelqing you're doing something wrong.....after your length work try to let your penis hang free,don't wear underwear...trust me i know this from experience...if you have a really good stretching sesion and then put your penis back into that tight underwear,it's going to turtle and it's something you don't want.
As for jelqing..give us more info...you should always get pumped from jelqing..even if you do 20 jelqs...you should see an expension.