afraid of giving birth. HBP.. GD

I don't know why, but for a while now I've been afraid of the moment when I have to give birth. I keep thinking I might die while giving birth or that I might have high blood pressure and die cause of it and now I might have gestational diabetes and that that is gonna increase my chances of dying while giving birth. When I had my first child, 10 years ago, they kept me for an extra day at the hospital to monitor my blood pressure because they said it was high after I gave birth or something. I'm very afraid. I've been very afraid and my husband just tells me I should stop being so negative. I had never been afraid of this, but I've been now for a few months and as time passes, I feel like I'm getting more nervous than I used to be. At my doctor's appointment they said I might have it or it might be that I was nervous, and I was extremely nervous both the times they checked it so they didn't check again at all. Am I the only one afraid of this? Has any one else experienced high bp and or gd and been okay after giving birth?