Hey, I am going on 18 weeks pregnant now. I also suffered from the sharp pain like cramps. Often when I cough, sneeze or go to the bathroom! or get up from a position...its normally down the sides. It is very normal. Its the uterus growing, all the muscles are stretching for the baby ...and these muscles growing are cause these kinds of pains. The dr. will tell you this too. The only thing you have to watch for is severe constant pains, and signs of blood or a fever etc. This is when you have to seek medical care. But don't worry at all...it sounds like you are worried just like I was! And the calcium thing?! nah...thats not what that is from. ITs just a lot of growth happening! The only way you know you are lacking somthing nutritionally is by being tested by the dr. They will tell you if you have lower levels of certaing nutrients such as iron, and calcium etc. So when you get to the dr. they will help you with all that. In the mean time, eat as healthy as poss, and buy some pre natal pills from the supermarket. Eat lots of protein and iron...and keep the cholestrol low. You'll be fine! Jeanette xxx