Matto, I had a similar experience with the Blessed Sacrament, but only at Benediction, when I looked at the Blessed Sacrament I could see it pulsating, this went on for several months, and one day I begged God to take it away, because I believed it was not of God, but the devil himself.
I remember praying to God, at first I looked around the Church to see if anyone else saw it, then I looked all around to see if there was a reflection from the fans above, but it would happen when the fans were off too. After several months, I begged God to take it away because it became nothing but a distraction for me, trying to figure it out, and also it was starting to make me feel special, that was when I realized it was the devil.
After I begged God, it disappeared and never again happened to me.
So be careful what you ask for.