I think I've gone fish crazy! I can't get enough of the stuff! Help!?!

I have never liked fish--even the mildest forms like tuna. I will eat it occasionally but not usually. About four weeks ago, out of the blue, I had the major, unavoidable craving for sushi (which I've only really had once, so I don't even know how I craved something I've had so infrequently????) Well, I went and got some at a really nice place and it was delicious! I loved it! But now I can't get enough. I crave it every single day. I woke up this morning craving it, after I just had some for lunch yesterday and for dinner the night before that. I'm getting a little worried. I thought this morning about how they have a sushi stand at my grocery store and I could buy it there and eat it every day. I have been losing weight since I started eating it and I just looooove the way it tastes!! I'm just worried that maybe something is wrong with me since I'm craving it so much? Please help, I'm a little worried here. I feel obsessed with sushi!