Yes, there are "pizza" dreams but there are dreams that are from the Lord. Here's a personal example, when our youngest son was in the 3rd grade, I dreamed that he was in an accident but survived. I didn't tell anyone. However, months later when we got the phone call that he had been in an accident, I yelled to my husband as we were running out the door, he's going to be ok! And our son ended up with a broken foot after being hit by a car traveling about 45 mph. After things had settled down, I told them about the dream. My husband said he had wondered why I didn't fall apart when we got the news and could hardly believe I was telling him our son was going to be ok after being hit by a car before we even got to him. But I just knew (inside) that our son was going to be okay in spite of the fact he had blood, glass, grass, gravel, etc. everywhere. He ask me at the emergency room - am I going to die? I told him No!
There are different types of visions, prophecies - too much info to cover here. Usually when people have dreams like this, pray and ask the Lord to reveal the meaning to you and He will - it might not happen immediately - the interpretation that is. I don't think this dream means you're going to die soon or anything like that. It's just a confirming dream of God's presence in your life.