I'm in my first trimester, 7-8 weeks along and for the last two weeks …

I'm in my first trimester, 7-8 weeks along and for the last two weeks I've been feeling unwell all the time. My temperature rises in the evening to 37 degrees. Every morning I have a stuffy nose. Sometimes I feel nauseous in the mornings. Is this normal overall? How can I alleviate this state of discomfort?