

Unknown Deity Made Me Feel Bad
I'm new to the practice and I haven't felt any connection to a deity and tend to be pretty independent with my work. Sorry if I misname anything.
When I went to a new metaphysical shop I was exploring and suddenly tasted blood in my mouth, tensed up, and felt a general sense of uneasiness. I had gone into a corner with a bunch of the candles in glass tubes with people on them. There was also an altar of a woman who looked like a grim reaper (Death?). I didn't read the plague because I felt so bad but luckily when I left the corner I felt instantly better.
Is this something to worry about? I always light candles and don't experience any ill effects. All I can assume is the altar caused something but how could I make a deity mad (if I did) without knowing them? Or is this all in my head and I'm just overeager?
Altar details: Many burning candles with the lady, pride flag (not sure if it was tied to the altar), and red and black colors