Yeah I Have Had Some Unexplained Things Happening In The

yeah I have had some unexplained things happening in the last week and half. First i started getting these red spots like hives or a rash that don't itch, burn or hurt they are just there. Then last night when I got home, I noticed a large bruise on my stomach the size of a door knob. It didn't hurt, but I don't remember hurting myself at all. I have a doctor's appoint on 5-31-16. Is this something that can wait to discuss with my doctor then or do I need to be more urgently concerned about this?