Now What?

I took my glucose text at 26 weeks. I was by called by my doctor saying my sugar level was high. It was 165 instead of 139. I have to go in for a 3 hour test tomorrow. I was wondering why this happens. I eat mainly fruits and drink water, lots of water. I've been keeping track of my weight and not eating for two. I don't have a sweet tooth. I don't crave sweets. why did my sugar level come up high? I felt mad that I have to go in again. I don't know what might have caused it. any ideas? Now what happens? I'm scared and upset that I don't know what I did wrong for this to happen! help!