Possible Psychic Attack and Fear of Meditation

I have a question for all of you. Since Tuesday, I have been very fearful about going to bed and been sleeping with the light on. I don't see anything, but feel somewhat uneasy. Worst of all, I am fighting off thoughts which are dark in nature which essentially saying names of things/possible entities I am afraid of. I do eventually obtain peace and fall asleep, but only after I pray for protection from God, my spirit guides and dead relatives. In the morning, I wake up feeling normal, but these thoughts return during the day and the cycle repeats itself. This has happened before in my life, but tends to be associated with a time of stress or depression. However, beyond much transition- both spiritually and situational- nothing has happened to cause this fearful activity. One last note, I have been to counseling, and beyond depression (and possible ADD); do not have any time of other mental illness. Could this be a form of psychic attack or be cause by psychological issues? I

Also, I am starting to get nervous meditating which has never happened before. For instance, the other night I was meditating and vibration shot up. I pictured myself hanging in space. I was hovering before a large wooden door and was told by my spirit guide to open it. Suddenly, I felt very afraid and my vibration began to fall. I couldn't bring myself to meditate after that. Have any of you seen this type of door in your meditations? What does it mean? Any advice on how I can resume meditating without fear?

I am looking inward for answers to these questions, but you all might have useful insight as well.

Thanks for reading

Cheers and blessings!
S