Extreme cold - pregnancy symptom

Ever since getting pregnant I’ve been getting EXTREMELY cold. I’m shivering even sometimes. I get chill bumps if I feel the slightest bit of chill. I even had my heater set at 77 degrees and had a blanket wrapped around me. I have never had the thermostat set that high so I tried setting the heater down to 75, and I just got too cold and had to turn it back up again. I take 2 prenatal vitamins a day so I believe I’m getting enough iron. I’ve just never experienced anything like this, has anyone else had this pregnancy symptom? (5w6d)