You are following the wrong walkthrough, use the walkthrough that is at the
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(Kertug's v2.1 Walkthrough) you are following the walkthrough that comes in the package of the game and it can get you into some nasty bugs.
There looks that there is something wrong with your Jet quest, you mean Jet has given you her number and her Photo? have you already been to the hospital after helping her? (then you should already know why you needed Jacqueline for, but it seems that you dont, so I dont know if you have gone to the hospital)
Try to be more specific on your progression of Jets quest and upload your savegame to check the bug. (also make sure to be playing latest version of My New Life V2.1 fixed+extras)