am I crazy?

So I found out the beginning of the week that I am pregnant! But somthing feels off. Like someone is playing this whole big prank on me. I took 4 different tests, and all positive. I don't get my period every month so when I was 2 months late, it didn't bother me. But about 12 days ago I started getting sick and tired. Didn't think anything of it until my husband joked that I might be pregnant. We've been trying for so long I didn't think he was right. But sure enough, 4 positives! I keep staring at the tests, thinking they are not real. I don't "feel" pregnant for some odd reason though. I won't have a doctors appointment for another couple weeks, but why do I feel like this isn't real? Is this normal?? I wanted this so badly for so long that I think I really convinced myself that it would never happen to us and now.. I feel like I'm lying to myself, and my husband saying that I'm pregnant. Am I crazy??