So i'm like 4-5 weeks pregnant and i'm feeling crazy tired, emotional, cranky and getting lower back pain and I know that's all normal... but i'm also not hungry... if I don't eat a little bit I start to feel nauseous, so im trying to keep eating... but I just can't eat much at all... I feel horribly bloated, my tummy looks huge from being so bloated, I go from being constipated to having diarrhea in the space of a day... I've felt like this for nearly a week now. I've got pains in my stomach from the constipation/diarrhea... this is my 3rd pregnancy, but I've never experienced anything like it!!