Need help. 7 weeks nauseous with no vomiting.

Hi mummy's! I'm 7 weeks currently. With nausea without vomiting. I'm hungry but I can't eat. I can barely finish my food. I can only take like 2 to 3 mouths of food each time. I try to drink milk to stop my hunger but I'm also lactose intolerant. I've tried eating plain biscuits and bread. Little by little, but my hunger doesn't go down. This feeling at the chest area, that constantly makes me want to puke but THERE IS NO PUKE COMING OUT. What can I do to help me out of this uncomfortable situation?