Blood test worry

Little worried because I had to have another blood test as something in my last one was a little higher than it should be by the doctor thinks it’s something to do with an infection. Last time when I rang up I got told that one blood test was fine but I had to come in and talk about one of them and this time when I rung up I got told my doctor needs to ring me and talk to me about it. He now has my mobile number and is going to ring me Wednesday hopefully before 2pm but I’m just a little worried as to why I wasn’t told if it was ok or not. I’m probably just over reacting but I can’t help it.