Okay so recently I have been feeling extremely nauseous, and exhausted. I have been having early nights to get around 10 hours of sleep but I'm still so tired! I also get headaches nearly every day and my mood swings are unbelievable! Also, my body temperature fluctuates loads, one minute I'm freezing, the next I'm sweating! Could I be pregnant? Me and my boyfriend had unprotected sex about 2 weeks so it could be a possibility...any advice? Are these symptoms of early pregnancy?