For the last couple of years it seems like I have become extremely intolerant to heat. Such as over the summer we were riding around in my husband's jeep with no air conditioning and the windows down and I started feeling so sick I insisted on being taken home. If the temperature raises just a few degrees, such as being in a 75 degree house, I start feeling bad. I'm 33 years old. Could it be some sort of hormonal imbalance? My aunt wanted me to be tested for anemia as it runs in our family. Any ideas welcome.