Well, after you cleanse her aura you need to figure out what it is if you can. If you cant then its ok, but I would make her a protection charm, maybe to wear on a necklace, ring, or bracelet. Even if you don't make one yourself, you can still enchant something with a protection spell and charge it with good and light energy.
what do you mean a text? I would just cast a protection spell on her then give her something to wear with a protection spell cast on it, like an amulet. then when the time comes, like you said, put her in a protective circle until the time passes. What is it and what does it want?
spirits don't text, hell do they have the knowledge to manipulate technology?
you're best off going to the police.
If it is a double aura [and not just a bf verses a jealous x bf] you're best option is to clense her aura, then trigger it to minorly surge.
It is very rare for a double aura and it has been years upon years since I heard of one but yes, it may just be a crease on layer 4, cause a minor surge and lie clothing it will wrinkle itself out... no ironing and do not tumbledry