I am a 33 year old woman and I had my tubes tied almost 10 years ago.  I have lately been feeling sick to my stomach during the day and at night.  I have been feeling that way for almost 2 1/2 weeks.  I have had friends tell me that they think that I might be pregnant.  I dont know if I am or not.  I just got off my period today.  Could I be pregnant?  I have been also experiencing headaches everyday and sleepiness.   I am also nausiated at food and smells are stronger.