Assalamu Alaikum
I don't think someone can perform istikhara for you, and I don't know why istikhara would be performed in this situation anyways. Makes no sense.
Secondly, you can perform ruqyaa on yourself. You don't need anyone to do this for you. You can read this:
https://uwt.org/wp-content/uploads/2...ah-Booklet.pdf
Also get in the habit of protecting yourself by reciting the morning and evening adhkaar (supplications), this helps protect you from any evil inshallah.
Also try to sleep in a state of wudhu! May Allah grant you ease and cure you ameen.