My bad, I somehow forgot to the paste the link for Luna.
Well, if you aren’t establishing any sort of boundaries, doing work with legit entities lights you up so to speak, to other types of spirits.
I’ve had spirits in the astral tell me they can sense as soon as I leave my body, because of the energy of me being different than the common- I don’t know that if it’s truly like that, but you can be noticed- be it out of body or in body just doing magical like things.
It’s better to learn protection either early on, or as soon as you become aware that you should know how to banish, than it is to be really fckd up later and clueless.
I wouldn’t feel to bad about it, I’d just chalk it up to a necessary learning curve and proceed with a more while practice. 
Later on you might need some real hard core protection, and the basics will help you there.