Question about spirit guide

(Don't know where the right place is to put this)

Do anyone knows if someone else (beside yourself) can send you a spirit guide?

I thought that what ever I was going through at the time (happy or sad) that beings, spirit guides would attract to similar energy but because of some experiences that I've had I wonder if it could be someone else (looking out for me) that was sending a protector or how this person viewed that being or spirit guide as a protector?