Normal?

So, I hardly ever weigh myself. Comes from years of being overweight I suppose. But this morning I really wanted to know how much I've gained. My jeans are all pretty tight now even though I'm still not showing a damn thing. So anyways, I got on the scale. And I've LOST 10 pounds. Is that normal? Is it hurting the baby? I knew peoplw lost weight during pregnancy but I thought it was due to morning sickness and stuff. I'm able to keep all of my food down and have been throughout the pregnancy. Please just tell me I'm crazy. And then tell me that I'm not suddenly going to gain a bazillon pounds now that I've voiced concerns over this lost weight.