Has anyone had pregnancy insomnia?

Im having trouble sleeping at night! I seem to prefer to sleep in the morning rather than night! I don't like it! I'm SO tiered when I finally get up in the AM. Then off to work where I'm falling asleep and have trouble staying up! Plus I been having pains In my lower belly. And when I lift things get so exhausted! Just from carrying groceries ,going grocery shopping or doing normal activity. It wips me out! Anyone experiencing this? I'm only 4 weeks prego.??