My fiance and I have been trying to get pregnant since last September. Well last week I took a pregnancy test because a friend had to take one and she needed comfort. It was 2 weeks before my period so of course negative which I knew. However, now I am super constipated, with sore boobs, nauseous and none of my jeans fit but I've only gained a half a pound. Could it just be constipation or is being pregnant a chance??? I don't want to take a test until I miss at least 2 periods.